Mainframe Defenders
-83%- Genres
- Indie, RPG, Strategy
- Released
- 25 Feb, 2020
- Developer
- Synthetic Domain
- Publisher
- Synthetic Domain
Mainframe Defenders price history
£0.75 today90-day low £0.75 (26 Oct 2026)Lowest recorded £0.7590-day average £0.75
Today's price is the lowest we've seen in the last 90 days. Cheapest UK-working PC key across the stores we compare, any edition; tracked since 26 Oct 2026.
About this 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
Trailer
Screenshots
PC system requirements
Minimum
- 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
- Additional Notes
- Requires a 64-bit processor and operating system
Mainframe Defenders prices: questions & answers
What is the cheapest Mainframe Defenders price for PC?
The cheapest Mainframe Defenders PC key right now is £0.75 at Kinguin, 83% below the usual price. We compare 5 offers from 4 stores for PC, and prices update at least twice a day.
Cheapest price today: £0.75 at Kinguin (83% off, usually £4.40). We compare 4 stores for Mainframe Defenders, and prices update at least twice a day. Prices can change; the store's checkout price is final. Platform and region details come from each store's listing; the store's product page is final. Zemly may earn a commission if you buy through links on this site, at no extra cost to you (affiliate disclosure).