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Geeky Alien
Diffusion

Screenshots

Diffusion screenshot 1
Demo Release Trailer trailerWatch trailer on Steam ↗

Diffusion

R.C. · Published by R.C.

Last updated 6 Oct 2026

Tower defense / Roguelike / Sci-Fi / Pixel Art game with boomer games aesthetics. Mine resources and shoot those disgusting aliens right in their faces. Unlock new technology, develop new strategies and explore the planet. A modern old-school Pixel Art experience with the vibe of 90s classics.

Free to PlayComing SoonDJCTQ 12

Free

View on Steam

Prices can lag the live Steam store — always confirm before buying.

Indie, Strategy · 2026 · More free games

Navigate the alien-infested planet of Diffusion as you mine resources and fend off invaders. Unlock advanced tech, strategize your defenses, and explore a modern pixel-art world inspired by 90s classics.

About this game

Use mining drills to gather ores and smelt them to gain building materials.



Defend your mining site from waves of disgusting hostile alien creatures.


Adapt your defenses to special alien abilities, daytime and biome.

Research new technology to expand your arsenal of passive and active buildings.

  • No asset flip / low effort game

  • Solo developer with lots of love and passion

  • No mixels :)

System Requirements

Will my PC run this? →

Minimum

Minimum:
  • OS: Windows 10
  • Memory: 4 GB RAM
  • Storage: 100 MB available space

Recommended

Recommended:
  • OS: Windows 10
  • Memory: 4 GB RAM
  • Storage: 100 MB available space

Supported Languages

English*, German*
*languages with full audio support

Latest news

  • AnnouncementsOfficial

    Demo out now!

    After 2 years of putting every free minute of my spare time into developing this game, i am finally able to release a demo!In this demo you get access to most buildings in 2 of the 4 tech tree branches with which you can explore half of the planet, ending with defeating one of the major bosses in the game.Everything beyond the demo's content is still work in progress. If you want to help shape the final game, share your feedback, here or you can join the game's Discord. I have not really advertised the discord server before, so i am still sitting in there alone. But it is the place where i post change logs of the internal beta publicly. So if you'd be interested in reading those and keep track of the game's development, hop in.Besides this, have fun with the Demo!
    Read full article on Community Announcements (R.C.)

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