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SimTower

SimTower: The Vertical Empire is a 1994 construction and management simulation developed by OPeNBooK Co., Ltd. and published by . In the game, players design and manage a single , constructing floors with offices, apartments, retail shops, hotels, and utility services while optimizing systems and responding to random events like fires, earthquakes, and terrorist threats to maintain tenant satisfaction and achieve the five-star rating and ultimate Tower status. Originally released for Windows and Macintosh computers, SimTower emphasizes strategic and in a vertical environment, differing from Maxis's broader city-building titles like by focusing exclusively on one high-rise structure. involves incremental expansion up to 100 floors, balancing population growth to 15,000 residents, and incorporating specialized elements such as lobby design, security measures, and VIP attractions to unlock advanced facilities like a or pad. The game's economy revolves around rental income from tenants, with success hinging on efficient vertical transportation to prevent overcrowding and dissatisfaction. Conceived by Japanese designer , SimTower originated as a titled The Tower before its Western release under the Sim branding. It launched in November 1994 for PC platforms, earning an ESRB rating of Everyone for its family-friendly simulation style. Ports followed for consoles, including the and in March 1996, and the in November 1996 as The Tower: Bonus Edition, which added a pre-built scenario. These versions retained core mechanics but adapted controls for controllers. SimTower received positive reception for its addictive depth and innovative focus on vertical management, averaging 74% from critics and influencing sequels like (1998). Its legacy endures in the simulation genre, highlighting the challenges of in a compact, replayable format.

Gameplay

Building Mechanics

Players begin constructing their skyscraper on a basic plot of land by placing a lobby on the ground floor, which serves as the and can be expanded to up to four sections wide at a cost of $5,000 per full lobby or $1,250 per segment. From there, floors are added incrementally above the lobby using the floor tool, with each empty floor section costing $500 to build and matching the width of the floor below it. The tower is limited to 100 floors above ground and 10 below ground. Construction costs for facilities remain fixed regardless of height under normal conditions, though overall upkeep expenses rise as the building grows taller due to increased maintenance demands. Various floor types and facilities can be constructed once floors are in place, each with specific costs and requirements to support tenant occupancy. Offices, costing $40,000 each and accommodating up to six employees, require access to electricity and water utilities for operation, as do apartments (condominiums sold for $80,000 each, housing three residents) and hotel rooms (single rooms at $20,000, twin rooms at $50,000). Shops and retail spaces cost $100,000, parking spots are $3,000 each (requiring ramps at $50,000 per floor), restaurants $200,000, and specialized facilities like fast food outlets provide lower-income options without detailed separate costs in the manual. These facilities must be placed strategically, often near lobbies or elevators, to ensure utility access and functionality. Elevator systems form the core vertical transportation , with two main types available: vertical and express elevators. cost $200,000 for the shaft and $80,000 per car, serving up to 30 floors with a of 17 passengers per car and a maximum of eight cars per shaft; they handle local traffic but can lead to long wait times if overloaded, negatively impacting by increasing levels. Express elevators, at $400,000 for the shaft and $150,000 per car, have a higher of 36 passengers and operate in 15-floor increments plus all underground levels, reducing wait times for taller structures and improving overall ratings. Up to 24 elevator shafts can be built, and additional cars can be added to existing shafts to alleviate congestion. Upon reaching 3 stars (1,000 population), advanced facilities such as VIP suites ($100,000 each, requiring dedicated ) become available. The "Tower" is achieved after 5 stars with 15,000 population and a on the 100th floor. This milestone enables further expansion toward a five-star , with features like sky lobbies recommended every 15 floors to facilitate transfers and maintain efficient traffic flow.

Tenant and Facility Management

In SimTower, tenant attraction relies on strategically placing facilities such as shops, restaurants, and movie theaters, which draw office workers, residents, and visitors to increase occupancy rates. These amenities generate foot traffic; for instance, a movie theater can attract large crowds that spill over to nearby commercial spaces within five floors, boosting sales and encouraging new tenants to move in. Happiness and retention are governed by metrics, calculated on a scale from 0 to 300, where lower values indicate better conditions—tenants with stress below 100 (rated "A" quality) may even bring friends to the building, while those exceeding 150 (rated "C") risk vacating if issues like poor proximity to amenities persist. Cleanliness and play crucial roles in maintaining satisfaction, with services hiring janitors to prevent issues like infestations that elevate levels. Players must position closets strategically, as coverage depends on their placement relative to floors, and multiple units may be needed for taller structures. Similarly, offices employ guards to respond to threats, with effectiveness tied to proximity; inadequate coverage can lead to higher complaints and departures. While and water supplies are automatically provided once basic is in place, ongoing costs for these services rise with the building's star rating, indirectly affecting budget stability. Income generation stems primarily from rent collected from offices and apartments—offices yield quarterly payments based on lease terms, while condos provide a one-time sale fee—and from facility sales, such as shop revenues that fluctuate with customer volume. Players balance budgets by adjusting rents (which influence if set too high) against maintenance expenses, aiming to avoid negative net revenues that could lead to ; the window displays quarterly totals, with figures multiplied by 100 for actual dollar amounts. Elevator efficiency aids tenant movement to these facilities, but detailed optimization falls under broader building mechanics. Monitoring tools include the facility window, which shows an evaluation bar color-coded for overall attitude—blue for excellent, yellow for good, and red for poor—alongside specific messages on complaints like dirty . The map window allows players to check individual levels and quality ratings, while satisfaction surveys are reflected in these visual indicators rather than formal polls, enabling proactive adjustments to sustain building viability.

Disasters and Challenges

In SimTower, disasters serve as unpredictable events that test the player's management skills, potentially leading to financial losses, dissatisfaction, and even tower collapse if not handled effectively. represent one of the most immediate threats, igniting randomly on any floor and spreading upward across multiple levels if unchecked, which can destroy facilities and drive away residents. To combat , players rely on strategically placed stations costing $100,000 plus ongoing , where personnel use to extinguish blazes based on their proximity to the outbreak; alternatively, summoning a fire rescue helicopter for $500,000 ensures rapid containment before significant spread occurs. Rat infestations emerge as another challenge, typically in unkempt rooms or condominiums when services are insufficient to maintain cleanliness, forcing players to bulldoze affected areas at a cost or bolster cleaning efforts to eradicate the problem and prevent recurrence. accidents occur due to overloading, where excessive demand causes cables to snap, resulting in sim fatalities, heightened resident stress, and further unhappiness that can trigger tenant departures. Terrorism manifests through bomb threats on upper floors, where anonymous demands for $20,000 to $30,000 appear; if unmet or if fails to locate the device via floor-by-floor searches using emergency stairs, an at 1:00 p.m. devastates a multi-floor section, potentially costing millions in repairs and lost revenue. Challenges intensify as the tower grows taller up to the 100-floor limit, with disasters becoming more frequent and complex, including escalated VIP requirements that demand advanced facilities and heighten overall risks, often culminating in mass exodus or total building failure without . Mitigation strategies encompass proactive installations like alarms and sprinklers to detect and suppress flames early, escapes for evacuation routes, cameras to enhance detection, and additional shafts or cars (up to 24 shafts with 8 cars each) to alleviate overloads. During crises, players can initiate response actions such as partial evacuations to limit casualties from s or explosions. Unmanaged risks contribute to declining happiness, compounding operational difficulties. The ultimate test lies in reaching endgame milestones while enduring these escalating threats: attaining a 5-star requires 10,000 , a , and prior fulfillment of 4-star needs including medical centers and centers; achieving the Tower demands 15,000 and a on the 100th floor, where survival hinges on flawless disaster preparedness and to avoid collapse.

Development

Origins and Inspiration

SimTower was conceived by Yutaka "Yoot" Saito, a developer with a background in and . After studying , , and at , Saito developed for Macintosh computers at Recruit Co., Ltd., before founding OPeNBooK Co., Ltd. in 1993 to pursue game development. His interest in simulation games was sparked by playing (1989), created by Will Wright, during his university years on a Macintosh, which inspired him to explore interactive city-building concepts after graduation. Saito's concept for SimTower drew directly from SimCity's emphasis on emergent and real-world urban dynamics, but adapted to a vertical scale to reflect the dense environments of cities like . Fascinated by operations—a key element of high-rise —Saito contacted an elevator company for details but received no response, prompting him to prototype a with programmer Takumi Abe to model their algorithmic behaviors. This evolved into a focused "software " on a single building's internal , emphasizing tenant life cycles, facility interactions, and unplanned events rather than expansive city planning. In 1993, Saito pitched an early demo of the vertical city-builder to , the publisher of . The prototype impressed Will Wright, leading to a publishing agreement despite Maxis's primary focus on horizontal expansion simulations, allowing OPeNBooK to complete development independently.

Design and Production

SimTower's core design innovations centered on a side-view interface that presented the as a cross-section, enabling intuitive floor-by-floor planning and visualization of vertical space utilization. This approach facilitated real-time management of building elements, distinguishing it from broader urban simulators by emphasizing verticality and individual-scale interactions. The game's simulation engine, built around an acquired elevator management program from a , handled dynamic tenant behaviors, via AI-driven routines for daily activities, and resource flows such as power and waste, creating from simple rules. Developed for using Microsoft's graphics library for efficient rendering on early 16-bit systems, it supported hardware like the 386 processor, prioritizing performance on low-spec PCs common in 1994. Production spanned 1993 to 1994 at OPeNBooK Co., Ltd., a newly formed studio led by designer , with a compact team of approximately five to seven members including programmer Takumi Abe and artists Atsusi Hotta, Yo Murashima, and Hidesato Matsumoto. Challenges included optimizing the for limited resources, such as ensuring smooth updates on 386-era machines without advanced graphics acceleration, and designing a complex system without in-game tutorials to maintain through intuitive observation. Saito's involved consulting elevator companies for authentic , though some details were withheld, influencing the engine's focus on realistic traffic flow. The absence of formal guidance encouraged player experimentation, balancing depth with the era's constraints. The art style employed pixelated graphics reminiscent of architectural blueprints, with clean lines and monochromatic tones for facilities to evoke technical schematics while highlighting tenant movements through color-coded figures. Sound design featured ambient MIDI tracks capturing urban ambiance, such as subtle city hums and rhythmic pulses, complemented by discrete effects like elevator dings, fire alarms, and a year-end bell sampled from Charlie Chaplin's City Lights to mark seasonal transitions. These elements reinforced the simulation's immersive, observational quality without overwhelming the modest audio capabilities of Windows 3.1 systems. Beta testing occurred internally in , emphasizing the game's addictiveness through extended play sessions that revealed tenant quirks and traffic bottlenecks, prompting refinements like an observer mode for passive viewing of inhabitant behaviors to enhance replayability and . This mode allowed players to accelerate time and watch unscripted events, addressing on engagement without adding overt tutorials.

Release

Initial Release

SimTower: The Vertical Empire was initially released in under the title The Tower in 1994 by developer and publisher OPeNBooK Co., Ltd. for personal computers. The game originated from OPeNBooK's efforts to create a vertical city-building , drawing on the company's prior work in for systems. In , Maxis acquired the publishing rights from OPeNBooK and launched SimTower: The Vertical Empire on November 1994 for Microsoft Windows 3.x and Mac OS Classic operating systems. This marked the game's exclusive debut on PC platforms, with no console ports available at the time of initial release. Maxis positioned the title as a in its Sim series, emphasizing vertical empire-building mechanics distinct from the horizontal of . The retail package included the game software on floppy disks or , accompanied by a comprehensive that provided tips alongside narrative elements exploring dynamics and building "stories." This bundling supported the game's focus on managing resident satisfaction and economic viability in a high-rise environment.

Ports and Re-releases

Following its initial release for Windows and Macintosh, SimTower received several Japan-exclusive console ports in the mid-1990s. These adaptations included versions for the and , both launched in March 1996 by OPeNBooK, which preserved the core building and mechanics while adjusting for controller input and smaller screens. A port, titled The Tower: Bonus Edition and also published by OPeNBooK, followed in November 1996, featuring additional bonus maps alongside the standard . Later handheld ports included The Tower SP for , released in on April 28, 2005, by , and in on March 21, 2006, by , serving as a simplified entry in the series with minor expansions to facilities and challenges. In 2008, DigiToys released The Tower DS for the , a direct adaptation that retained essential simulation elements like tenant management and elevator optimization, optimized for the system's dual screens and touch controls. This version was not localized outside . For mobile platforms, developer oversaw a 2010 iPad release of —the 1998 PC sequel to SimTower—published by DigiToys via the iOS on December 15. This version incorporated touch-based controls, expandable tower heights beyond the original's limits, and select enhancements from the sequel, such as new building types, while maintaining compatibility with the franchise's foundational mechanics. No official Android port of SimTower exists, though inspired titles like Droid Towers emerged as independent simulations in 2012. No official digital re-releases have appeared on platforms like or , owing to the game's age and rights complexities following Maxis's acquisition by . However, the original remains DRM-free and widely preserved as . The latest official patch, version 1.1B, addresses stability issues and is available from archival sources, enabling better compatibility on older Windows systems. As of 2025, SimTower is freely accessible through sites and browser-based emulators, allowing play on modern hardware without installation. Community efforts include fan compatibility guides for 64-bit Windows using tools like WineVDM and ongoing open-source projects to recreate the game in web browsers, incorporating quality-of-life improvements while respecting the original design. These preservation initiatives ensure the game's availability amid expired licenses, with no new official ports announced.

Reception and Legacy

Critical Reception

Upon its release in 1994, SimTower received generally positive reviews from critics, who praised its innovative take on the genre by focusing on vertical construction and emergent tenant interactions rather than sprawling city-building. Computer Gaming World awarded it a score of 90 out of 100, highlighting the game's engaging gameplay loop and its ability to create a sense of emergent through the lives of residents in the tower. Other outlets, such as PC Format () and Power Unlimited, gave it 80 out of 100, commending the addictive nature of the building mechanics and the strategic depth involved in managing facilities and elevators to maintain tenant satisfaction. Critics noted some drawbacks, including difficulty learning the game due to lacking documentation. The game also lacked multiplayer features. Aggregate critic scores across platforms averaged 74 percent based on 17 reviews, reflecting its solid but not groundbreaking reception compared to broader Sim series titles like . Commercially, SimTower achieved niche success, selling sufficiently well to warrant ports to additional platforms and inspire a sequel, , though it did not match the multimillion-unit sales of due to its more focused scope. It was particularly successful in , where it originated as The Tower, earning developer the "Best Young Manager/Venture of the Year" award from the Nihon Keizai Shimbun. Player reviews on aggregation sites averaged 3.4 out of 5 from over 60 submissions, emphasizing its timeless addictiveness despite simplistic graphics. In modern retrospectives, SimTower is often described as a timeless classic for its elegant design, though its 2D visuals and dated interface are frequently cited as limitations by contemporary standards. As of , renewed interest has emerged through online communities, including efforts on platforms like Speedrun.com, where players optimize tower completion times in categories such as full tower builds, fostering discussions on efficient strategies and glitches. Fan-driven projects, such as open-source clones and browser-based recreations of SimTower and its , continue to extend its legacy, alongside new titles like News Tower (), which adapts its mechanics to .

Cultural Impact and Sequels

SimTower's innovative approach to vertical city-building and tenant management established it as a pioneer in the skyscraper simulation subgenre, distinguishing itself from broader games by emphasizing upward expansion and interpersonal dynamics within a single structure. This focus influenced subsequent titles in the management simulation genre, including the direct sequel (released in 1998 and known as The Tower II in ), developed by OpenBook Co., Ltd. under Yutaka "Yoot" Saito's direction, which introduced three-dimensional graphics, diverse global settings such as Waikiki Beach and , and enhanced transportation systems like express and service elevators to facilitate larger-scale constructions. Despite these expansions, experienced poor commercial performance, with low sales figures limiting further planned content such as additional location packs. The game's legacy extends to modern interpretations, such as (2016) by SomaSim, which developers explicitly modeled after SimTower's core mechanics of floors, monitoring satisfaction, and handling emergent events, though it adopts a more structured progression system and updated visuals to appeal to contemporary audiences. As part of Maxis's early simulation portfolio, SimTower contributed to the broader cultural fascination with architectural and simulations, appearing alongside titles like in discussions of games that sparked interest in city planning professions among players who later pursued careers in urban development and infrastructure management. Saito's success with SimTower enabled him to found Inc. and pursue experimental projects, culminating in the release of Seaman in 1999 for the , a simulator that leveraged voice recognition and AI-driven interactions, marking a shift toward more narrative and technological innovation in his oeuvre. Within gaming communities, SimTower maintains enduring appeal as a "software toy"—a term popularized by co-founder Will Wright to describe open-ended simulations that prioritize player experimentation over strict victory conditions—evident in ongoing fan recreations and discussions that highlight its role in the evolution of design. While formal modding remains limited, enthusiast efforts on platforms like ModDB reflect persistent community engagement with the title's mechanics as of 2025.

References

  1. [1]
    SimTower: The Vertical Empire (Game) - Giant Bomb
    Mar 14, 2025 · SimTower: The Vertical Empire, known in early Japanese releases as Tower and in later ones as The Tower, is a high-rise building management game ...
  2. [2]
    SimTower Game Help and Support - Computer Hope
    Sep 7, 2025 · SimTower overview. SimTower game box. Type: Strategy ESRB Rating: Everyone Release Date: 11/1994. Developer: OpenBook Co., Ltd.
  3. [3]
    SimTower: The Vertical Empire (1994) - MobyGames
    SimTower: The Vertical Empire ; Released: November 1994 ; Credits: 50 people ...
  4. [4]
    SimTower (Windows 3.11) - ClassicReload.com
    Rating 3.7 (437) Released in 1994 by Maxis for Windows and Mac · Focused on building and managing a single skyscraper · Success depends heavily on efficient elevator systems
  5. [5]
    SimTower: The Vertical Empire - LaunchBox Games Database
    Nov 1, 1994 · Release Date: November 01, 1994. Game Type: Released. Max Players: 1. Cooperative: No. ESRB: E - Everyone. Platform: Windows 3.X. Share ...
  6. [6]
    SimTower - Strategy Guide - PC - By MentalMan - GameFAQs
    Sep 20, 2000 · Express Elevator- Costs $400,000 shaft, $150,000 car plus maintenance. Goes to every 15 floors plus all underground floors. Restaurant- Costs ...Missing: mechanics | Show results with:mechanics
  7. [7]
    Full text of "SimTower Manual PC" - Internet Archive
    When you place an area, you are not only charged the construction costs for that zone, but also for the cost to build the empty floor to support the facility.<|control11|><|separator|>
  8. [8]
    SimTower - FAQ - Macintosh - By BStuart - GameFAQs
    Feb 14, 1995 · SimTower FAQ This is the unofficial FAQ file for SimTower, including material from the Macintosh version 1.2.
  9. [9]
    Yoot Saito (Person) - Giant Bomb
    He was educated at the prestigious Tokyo's Waseda University where he studied science, engineering and architecture ... company in order to stay alive. He ...Missing: background | Show results with:background
  10. [10]
    SimTower: The Vertical Empire | The Obscuritory
    Apr 26, 2011 · Yoot Saito developed a surprisingly personal take on Maxis's simulation sandbox genre – and one of the stronger entries in the Sim series.
  11. [11]
    The Tower - Sega Retro
    The Tower is a "tower" simulation game similar in design to Maxis' SimCity (a game which inspired Saito). Players essentially construct a tower.
  12. [12]
    IGNDC Interviews Vivarium's Yoot Saito - IGN
    Jun 8, 2000 · Yoot Saito is the planner/designer/idea-man over at Vivarium, the Japanese office that saw the birth of Seaman in the digital gaming world.Missing: software | Show results with:software<|separator|>
  13. [13]
    The Designer's Notebook: The Perils of Bottom-up Game Design
    Oct 17, 2004 · "Sim Tower was built around a real elevator simulation program we bought from a Japanese guy." That explained a lot. Sim Tower was an ...
  14. [14]
    The Eccentric Genius of Game Designer Yoot Saito - Honey's Anime
    Jan 15, 2019 · Building on the previous project, he teamed up with freelance programmer Takumi Abe for their first release: The Tower for Windows 3. ... game as ...
  15. [15]
    [PDF] sim tower - Old Games Download
    Sim Tower. Page 4. Tokyo Team. Concept and Game Design: Yoot Saito. Programming: Takumi Abe. Artwork: Atsusi Hotta, Yo Murashima,. Hidesato Matsumoto. Sounds ...<|separator|>
  16. [16]
    SimTower - PCGamingWiki
    Sep 10, 2025 · SimTower ; Publishers. Maxis ; Release dates. Windows 3.x, November 1994. Mac OS (Classic) ; Taxonomy. Monetization, One-time game purchase. Modes ...<|separator|>
  17. [17]
    The Tower DS (2008) - MobyGames
    Jun 10, 2019 · The Tower DS is a building management simulation developed and published by DigiToys for the Nintendo DS platform.
  18. [18]
    The Tower SP - The Tower Wiki - Fandom
    The Tower SP is a sequel/port of SimTower for the Nintendo DS. Surprisingly, it was translated and sold in the USA after The Tower DS was released in Japan.
  19. [19]
    Yoot Saito's 'Yoot Tower' Now Available for iPad… In English!
    Dec 15, 2010 · The sequel to SimTower that arrived a few years later, called Yoot Tower, is what the iPad version is based off of. A brief description from our ...
  20. [20]
    Yoot Tower International Releases - Giant Bomb
    Yoot Tower ; Platform, iPad ; Region, United States ; Developer ; Publisher ; Release date, December 15, 2010.
  21. [21]
  22. [22]
    Simtower | DOS games in browser
    Rating 4.3 (3) A classic simulation game where players design and manage a skyscraper. Balance construction, amenities, and tenant needs to create a thriving urban ...Missing: engine AI
  23. [23]
    Play Sim Tower: The Vertical Empire | WePlayDOS.games
    Facilities Management: Include useful amenities like restaurants and gyms to attract more tenants. The right mix of facilities can increase foot traffic and ...
  24. [24]
  25. [25]
    YootTowerManagement/YootTower: Yoot Tower - GitHub
    Maxis published SimTower by Yoot Saito, which later developed and published as Yoot Tower in the US and The Tower II in Japan, along with many plug-ins using ...Missing: origins | Show results with:origins
  26. [26]
    SimTower: The Vertical Empire reviews - MobyGames
    Average score: 74% (based on 17 ratings). Player Reviews. Average score: 3.4 out of 5 (based on 62 ratings with 2 reviews). So simple...yet somehow addicting.
  27. [27]
    SimTower is a classic, but is too simple and defunct at times
    Rating 3.5 · Review by Eric43Jul 9, 2009 · For SimTower on the PC, a reader review titled "SimTower is a classic, but is too simple and defunct at times".
  28. [28]
    Retrospective: SimTower | Everything is bad for you - WordPress.com
    Jul 19, 2014 · Offices and hotel rooms are at least guaranteed income as long as they are occupied, but if the general happiness of the tenants falls enough, ...Missing: mechanics | Show results with:mechanics
  29. [29]
    SimTower - Speedrun.com
    View SimTower speedruns, leaderboards, forums and more on Speedrun.com.Missing: community 2025
  30. [30]
    Yoot Tower (1998) - MobyGames
    Released: November 20, 1998 on Windows; Credits: 20 people · Releases by Date (by platform). 1998 (Windows); 1998 (Macintosh); 2010 (iPad). Publishers.
  31. [31]
    'Project Highrise' Is a Pale Yet Functional Shadow of 'SimTower' - VICE
    Sep 11, 2016 · Project Highrise is a new PC and Mac game from developer Somasim out now on Steam and GOG for $20. It puts players in charge of constructing a building from ...
  32. [32]
    Must Reads: From video game to day job: How 'SimCity' inspired a ...
    Mar 5, 2019 · “SimCity” was their first taste of running a city. It was the first time they realized that neighborhoods, towns and cities were things that were planned.
  33. [33]
    Seaman creator Yoot Saito on the Dreamcast AI that was ahead of ...
    Sep 6, 2019 · Yoot Saito was previously best known as a Mac-focused developer who created The Tower, a tower management game that SimCity studio Maxis ...Missing: inspiration | Show results with:inspiration
  34. [34]
    Game Master | The New Yorker
    Oct 30, 2006 · Will Wright changed the concept of video games with the Sims ... software toy”—a concept that influenced Will Wright's notion of possibility space ...<|separator|>
  35. [35]
    SimTower: The Vertical Empire Windows, Mac, GBA game - ModDB
    RTX Remix is a modding platform by NVIDIA, which allows modders to create stunning HD remasters of classic games (see all supported), with ray tracing and DLSS.