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About Lost in the Backrooms: Day 100

Lost in the Backrooms: Day 100 is a survival game about navigating dangerous levels of the Backrooms. You can play alone or in co-op with up to six players, exploring strange environments while watching your sanity and avoiding entities. They say there may be a chance to escape on the 100th day.

Levels and entities

The game has more than 15 levels, each with different environments, dangers and ways to escape. Seven entities have distinct appearances, abilities and behaviours, so you need to use different strategies to make progress.

Game modes

Liminal mode is a walking simulator through unsettling liminal spaces, with no monsters. In another mode, one player in a group is selected as the monster and must kill everyone within the time limit. The survivors must last for seven minutes.

Co-op communication

In co-op, proximity chat lets you talk to nearby friends as you explore together.

Frequently asked questions

Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.

Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.

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