Downfall Survival Sim
Command the last bunker. Survive the wasteland, one day at a time.
The world ended. Your story didn't.
Downfall Survival Sim is a post-apocalyptic survival-strategy game played one day at a time. Take command of a bunker in the wasteland, keep food, water, power and medicine flowing, and grow a handful of souls into a settlement that can outlast the end of the world.
Every day is a decision: send a squad into the ruins for scrap, queue research to advance your bunker, patch the walls before the next assault - or push your luck. It's a single-player, offline-first experience. No forced ads, no tracking - just you, your survivors, and the wasteland.
Available for iPhone and iPad (iOS 15 or later) on the App Store and for Android phones and tablets on Google Play. Free to download, with only optional one-time purchases and no ads.
Features & highlights
Run the last bunker
Balance food, water, power, medicine, scrap and ammo. Keep bunker integrity and morale up - or watch your settlement crumble.
Lead your survivors
Recruit scouts, medics, guards and farmers - each with their own traits, rarity and levels. Every soul counts, and every wound matters.
Scavenge the wasteland
Send squads to scrap yards, dead foundries and beyond. Weigh risk, radiation and travel time - then unlock whole new sectors.
Defend against the dark
Mutant packs, feral hounds and raiders test your gates. Read the threat, ready your garrison, and pick your odds: fight or hold.
Build & research
Expand housing, hydroponics and defenses, queue research projects, and push your bunker through the tiers of the new world.
Offline & privacy-first
Plays fully offline - your save lives on your device. No analytics, no advertising IDs, no profiling. The only network call is the store.
From inside the game
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Frequently asked questions
Is Downfall Survival Sim free to play?
Yes. Downfall Survival Sim is free to download on Google Play and the App Store. The only things to buy are a few optional, one-time in-app purchases such as Survivor Mode. No subscriptions, no consumables, no ads.
Which platforms is Downfall Survival Sim available on?
iPhone and iPad running iOS 15 or later on the App Store, and Android phones and tablets on Google Play.
Can I play Downfall Survival Sim offline?
Yes. The core game is fully playable offline and your save is written to your device. The app uses the internet only to validate optional purchases and, if you choose, to leave a store review.
Does Downfall Survival Sim have ads or tracking?
No. There are no ads, no advertising IDs, no analytics, no crash reporting and no accounts. Nothing about your play leaves the device. See the Downfall privacy notice.
What kind of game is Downfall Survival Sim?
A day-by-day survival strategy and bunker management game set 123 years after World War 3 turned the USA into a wasteland. You ration food, water, power, medicine, scrap and ammo, recruit scouts, guards, medics, engineers, farmers and traders, upgrade bunker modules, send squads to scavenge the ruins, and defend the gates against mutant packs, feral hounds and raiders.
Is Downfall Survival Sim multiplayer?
No. It is a single-player game with no online features, leaderboards or accounts.
When was Downfall Survival Sim released?
On July 25, 2026, on both Google Play and the App Store. It receives regular updates.
What is the age rating for Downfall Survival Sim?
Rated 9+ on the App Store and Everyone 10+ on Google Play. It depicts mild, stylised survival conflict and is not directed at children under 13.
Who makes Downfall Survival Sim?
XXI Online Games, an independent studio based in Bucharest, Romania. Support is at support.xxi.online, by email at [email protected], or on Discord.
Ready to survive the downfall?
Free to download. Single-player. Plays offline. No forced ads.