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Games Indie Mainframe Defenders
Content rating unavailable
Indie · Synthetic Domain

Mainframe Defenders

Mainframe Defenders
Content rating unavailable
Steam Deck Playable 🖥 Windows 🐧 Linux
Very Positive · 87% of 781
DeveloperSynthetic Domain
GenreIndie
$0.77 −87% near all-time low
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Our take

Great time to buy

Strong reviews, and it's near its cheapest ever.

Quality87/100
Excellent
  • 87% positive of 781 reviews
Value100/100
Lowest ever
  • Now $0.77 — 87% off $5.99
  • Lowest we've recorded: $0.77

Compare prices

Official store Best price
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steam, Official store, 87% off, $0.77
Shop now at steam
Official store
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gog, Official store, $5.99

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Purchase options(1)

Packs & bundles(14)

About

MAINFRAME DEFENDERS - Turn-based tactics centered around gear and unit customization. It offers simple combat, high replayability, and tons of loot. Items don't just provide stats boost, but also offer distinct mechanics that can be combined into powerful builds.

Next Game: The Bunker Notes


About the Game

MAINFRAME DEFENDERS

Tactical retrofuturistic strategy game. A computer virus has infiltrated the "Stargazer" research complex. Most of the robotic units are controlled by the virus. Lead a squad of 4 prototypes on a mission to defend complex mainframe. You'll have to repel assaults, destroy unit fabricators, download valuable data, clear infected nodes, and do more on your way to the deepest parts of the complex. Work with item limitations and drawbacks to build powerful combinations. Destroy your enemies with diverse tactics: overheat them, melt with corrosion, absorb damage, and return fire. But don't rely on a single strategy too much - enemies might have a way to counter it. But above everything else: defend the Mainframe!

* RETRO STYLE: Graphics, inspired by 80s terminal PC with hybrid synthwave soundtrack.

* DIVERSE TACTICS: Cook enemy robots to death, bury them under your bullets, eliminate with a single powerful shot, or render your opponents useless with debuffs - this game is designed with a lot of viable strategies in mind.

* BUILD YOUR SQUAD: Similar to how in card games you have to build your deck, in Mainframe Defenders you have to combine different items with unique abilities, to create an unstoppable squad. Work with item drawbacks or double down on them, creating flawed, yet powerful build!

* UNIQUE ENEMIES: Enemy squad won't sit idle, though. Each unit has its own role in the squad and designed to counter certain strategies. Pick your targets wisely, or you will lose.

* PROCEDURAL LEVELS: Hand-made rooms are combined with procedural generation to create random levels. Missions have differing objectives, combined with unique mission conditions. Will you accept the challenge or avoid the unknown and risk falling behind?

* PROGRESSION SYSTEM: Victory or defeat, the game is not over yet! Unlock new units, each with a unique set of upgrades and load-outs. Unlock new items to bolster your new strategies.


Join our Discord to stay informed about updates for Mainframe Defenders. There you can share feedback and suggestions, as well as chat with our team about the next project_

Review sentiment over time
positive critical

Media

Mainframe Defenders screenshot 1
Mainframe Defenders screenshot 2
Mainframe Defenders screenshot 3
Mainframe Defenders screenshot 4
Mainframe Defenders screenshot 5
Mainframe Defenders screenshot 6
Mainframe Defenders screenshot 7

System requirements

System requirements platform
Minimum
Minimum:
  • Requires a 64-bit processor and operating system
  • OS *: Windows 7 or later
  • Processor: Intel Celeron
  • Memory: 2048 MB RAM
  • DirectX: Version 10
  • Storage: 200 MB available space
  • Additional Notes: Requires a 64-bit processor and operating system
Recommended
Recommended:
  • Requires a 64-bit processor and operating system
  • Additional Notes: Requires a 64-bit processor and operating system
Minimum
Minimum:
    Recommended
    Recommended:
      Minimum
      Minimum:
      • OS: Ubuntu 14.04 LTS
      • Processor: Intel Celeron
      • Memory: 2048 MB RAM
      • Storage: 200 MB available space
      • Additional Notes: Requires a 64-bit processor and operating system
      Recommended
      Recommended:
      • Additional Notes: Requires a 64-bit processor and operating system

      Achievements

      14 achievements

      • MAINFRAME_DEFENDERS
        4.4% of players
      • RUST_BUCKET
        3.9% of players
      • EMPLOYEE
        3.5% of players
      • LONG_TERM_STRATEGY
        3.3% of players
      • MIDDLE_MANAGER
        2.6% of players
      • HEAT_DEATH
        2.5% of players
      • VALUABLE_PROPERTY
        2.0% of players
      • ASSETS_HOLDER
        1.9% of players
      • FIREWALL
        1.8% of players
      • RND
        1.5% of players
      • VICE_PRESIDENT
        1.5% of players
      • CEO
        1.3% of players
      • EFFECTIVE_MANAGER
        1.3% of players
      • ECONOMY
        1.2% of players

      Age rating & content

      dejus10
      igrs13
      Kekerasan
      steam_germany12
      Gewalt
      usk6

      Price history

      Lowest prices
      Lowest prices view
      All-time low $0.77
      2026-07-05
      Current $0.77
      3-month low $0.77
      12-month low $0.77
      All-time low $0.77
      2026-07-05

      Latest news

      Game info

      Developer Synthetic Domain
      Publisher Synthetic Domain
      Platforms Windows, Linux
      Compatibility
      Steam Deck Playable
      Features
      Single-playerSteam AchievementsSteam Trading CardsFamily SharingAdjustable Text SizeCustom Volume ControlsPlayable without Timed InputKeyboard Only OptionMouse Only OptionTouch Only OptionAdjustable DifficultySave Anytime