Mainframe Defenders on Steam - User reviews, Price & Information

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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.

Mainframe Defenders is a exploration, tactical rpg and traditional roguelike game developed and published by Synthetic Domain.
Released on February 25th 2020 is available on Windows and Linux in 13 languages: English, Russian, Hungarian, German, Portuguese - Portugal, French, Italian, Spanish - Spain, Polish, Simplified Chinese, Korean, Japanese and Portuguese - Brazil.

It has received 691 reviews of which 609 were positive and 82 were negative resulting in a rating of 8.3 out of 10. 😎

The game is currently priced at 0.49€ on Steam with a 90% discount.

The Steam community has classified Mainframe Defenders into these genres:

Exploration Tactical RPG Traditional Roguelike Rogue-lite Sandbox Rogue-like Strategy RPG 2D Mechs Isometric Turn-Based Combat Procedural Generation Pixel Graphics Military Minimalist Atmospheric Futuristic 1990's 1980s

Media & Screenshots

Get an in-depth look at Mainframe Defenders through various videos and screenshots.

Mainframe Defenders screenshot
Mainframe Defenders screenshot
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Mainframe Defenders screenshot

System requirements

These are the minimum specifications needed to play the game. For the best experience, we recommend that you verify them.

Windows
  • 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
Linux
  • 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

User reviews & Ratings

Explore reviews from Steam users sharing their experiences and what they love about the game.

Nov. 2025
Browsing through games under a certain price usually feels like looking through a junk basket on a thrift store. Amid the junk, sometimes a gem appears, and this game is the perfect example. Imagine XCOM and FTL with robots inside a mainframe, with upgrades and customization, and everything very dynamic. For this price, it's a steal.
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Nov. 2025
You command a team of four prototype mechs to fight a computer virus in a futuristic complex, combining items and abilities into a variety of builds ✅You can freely choose one of several missions and choose the difficulty level ✅Large quantity of items ✅Every choice you make matters because destroying all the mechs ends the game ✅A lot of missions and different goals ✅Very dynamic gameplay ✅The game has an autosave ✅Nice soundtrack ✅Low price ❌The opponents have a different set each time and even choosing the easy level can be difficult ❌Very unreadable interface ❌Poor graphics ✅✅Verdict: Very Bad , Bad , Decent , Good , Very good (Rating scale for tested games) If you have any questions about my reviews, feel free to ask. Im happy to answer them. All reviews are my own!! Best regards, King Viking Bezimienny, Polish Game Reviewer.
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June 2025
played a 3-4 runs on 'normal', tended to die on first couple missions. next run i made it past the first couple missions, snowballed so that end of tier 1 and all of tier 2/3 were 'too eacy', then died on final run (which seemed to be a significant bump up in difficulty, and maybe needs some particular attention to one's build as the 'real goal'. so like FTL that way, but i think such a 'reverse difficulty curve with curve-ball at the end' isn't great design IMO. i'll echo some other complains: lack of docs, UI doesn't show some critical seeming stuff, balance/difficulty curve seem like the could use some polish. but there seem to be (i guess) multiple interesting builds to try out, and it's really not bad overall. i can solidly recommend it as-is to genre fans with some patience, bearing in mind the issues, at least at a low price for a few runs at least (bearing with it till you at least get to the last level on a normal run). hope the dev is doing well!
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March 2025
Lovely little game, found it while browsing the sales like the cheap-ass I am, and found this little gem. Nice variety of Mechs, Upgrades and Items. Requires paying attention to positioning, prioritizing the right enemies and accurately building your Mechs to synergize and cover eachother weaknesses. Also the soundtracks are bangers.
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March 2025
This game is actually quite simple than I first thought when I began playing, so that's good for me, since I don't play Tactical RPGs often. But man, this game had me sucked in for quite a while. I finished playing in hard mode, and while it kicked my butt in the beginning, after a while, getting a grasp of the mechanics and whatnot, I still wanna continue playing and unlock some cool gear, experiment with builds till I can't anymore. Really fun little game. This is a great gateway to more of these types of games, which I am now a fan of. Try it out! Literally cheaper than a Hershey's bar lol.
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Frequently Asked Questions

Mainframe Defenders is currently priced at 0.49€ on Steam.

Mainframe Defenders is currently available at a 90% discount. You can purchase it for 0.49€ on Steam.

Mainframe Defenders received 609 positive votes out of a total of 691 achieving a rating of 8.28.
😎

Mainframe Defenders was developed and published by Synthetic Domain.

Mainframe Defenders is playable and fully supported on Windows.

Mainframe Defenders is not playable on MacOS.

Mainframe Defenders is playable and fully supported on Linux.

Mainframe Defenders is a single-player game.

Mainframe Defenders does not currently offer any DLC.

Mainframe Defenders does not support mods via Steam Workshop.

Mainframe Defenders does not support Steam Remote Play.

Mainframe Defenders is enabled for Steam Family Sharing. This means you can share the game with authorized users from your Steam Library, allowing them to play it on their own accounts. For more details on how the feature works, you can read the original Steam Family Sharing announcement or visit the Steam Family Sharing user guide and FAQ page.

You can find solutions or submit a support ticket by visiting the Steam Support page for Mainframe Defenders.

Data sources

The information presented on this page is sourced from reliable APIs to ensure accuracy and relevance. We utilize the Steam API to gather data on game details, including titles, descriptions, prices, and user reviews. This allows us to provide you with the most up-to-date information directly from the Steam platform.

Additionally, we incorporate data from the SteamSpy API, which offers insights into game sales and player statistics. This helps us present a comprehensive view of each game's popularity and performance within the gaming community.

Last Updates
Steam data 22 January 2026 16:18
SteamSpy data 23 January 2026 17:19
Steam price 28 January 2026 20:26
Steam reviews 28 January 2026 23:47

If you'd like to dive deeper into the details about Mainframe Defenders, we invite you to check out a few dedicated websites that offer extensive information and insights. These platforms provide valuable data, analysis, and user-generated reports to enhance your understanding of the game and its performance.

  • SteamDB - A comprehensive database of everything on Steam about Mainframe Defenders
  • SteamCharts - Analysis of Mainframe Defenders concurrent players on Steam
  • ProtonDB - Crowdsourced reports on Linux and Steam Deck Mainframe Defenders compatibility
Mainframe Defenders
🔥 Deal -90% 4.90€ 0.49€ Buy Now Show Price
Rating
8.3
609
82
Game modes
Features
Online players
1
Developer
Synthetic Domain
Publisher
Synthetic Domain
Release 25 Feb 2020
Platforms
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