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Watch trailer on Steam ↗Millennium Slumber
Desmodus Games · Published by Desmodus Games
Last updated 28 Sept 2026
Survive 400,000 years on a planet infested with an alien calamity! Gather resources, build a base and defend against hordes of nocturnal monsters in this rogue-like with cryostasis mechanics.
Action, Adventure, Indie · 2027 · More free games
Embark on an epic journey of survival as you gather resources and build defenses against nocturnal alien threats in Millennium Slumber. Experience the thrill of cryostasis mechanics in this intense action-adventure game.
About this game
Survive 400,000 years on a planet infested with an alien calamity! Gather resources, build a base, and protect your cryostasis machine against hordes of nocturnal monsters in this sci-fi base building, top down shooter roguelike.
Can you adapt to survive millennia of evolution?


Find resources across a randomly generated planet: plants, scrap metal, weird sentient crystals, everything can be used to survive. Resources can be collected in different ways: blow up a spaceship for some scrap metal, harvest your glowing potted plant, kill an alien dragon to get its eyes...

Build a base to protect your only way to survive through millennia: the cryostasis machine. Turrets, traps, mining drills, decoys... each building has its unique behaviour! Obtain new blueprints across your runs and experiment to find the best way to repel all the monsters.



Once the night has come, it's you, your base, and the monsters. Will you survive until sunrise? What would you do when the Forever Night will come?
Use everything you have to repel the alien abominations for the next hundred thousand years!

Once the planet is safe, enter cryostasis for a hundred thousand years nap. Climate change, evolution of species, meteorites, new civilizations... Who knows what the planets will be like when you'll wake up?
Can your actions change the future of this planet?

We think you will like Millennium Slumber if you like these games: Don't Starve, Wizard with a Gun, Cult of the Lamb.
System Requirements
Will my PC run this? →Minimum
- OS: Windows 10 (64-bit)
- Processor: Dual-core 2.0 GHz
- Memory: 4 GB RAM
- Graphics: Intel HD Graphics 5500, AMD Radeon R5 Graphics
- Storage: 1 GB available space
Recommended
- OS: Windows 11 (64-bit)
- Processor: Quad-core 3.0 GHz
- Memory: 8 GB RAM
- Graphics: NVIDIA GeForce GTX 1050, AMD Radeon RX 460
- Storage: 1 GB available space
Supported Languages
Latest news
Community & EventsOfficial
Millennium Slumber Demo available during the PvE Survival Crafting Fest!
Hello everyone! Exciting news, Millennium Slumber demo will be available during the Steam PvE Survival Crafting Fest!It's the very first time the game is playable on Steam, which is a huge step for us! We're very excited to hear your feedback and suggestions regarding gameplay, balancing, or visuals. We've opened a Discord server on this occasion: https://discord.gg/gNtmPMsvQ3Feel free to join to share your thoughts, and get in touch with the future of the game! The demo will be removed at the end of the fest, but if you cannot try it this time, don't worry, it will come back with fresh new content!Happy survival!Read full article on Community Announcements (Desmodus)






