Alterum
Released 13 October 2026 · PC · Action, Indie

A multiplayer social deduction horror where spells are spoken aloud. One of you is altered. Cast magic with your voice, hunt the traitor, survive the ritual. Every word can save - or kill.
Story
A team of explorers arrives at a new site and discovers something inexplicable. Their colleagues have become possessed by restless spirits - they are now "altered." Are you certain about the people you trust with your life? In this place, every spell spoken aloud carries real consequences - for you and for everyone around you. Multiplayer for 4–8 players. Utter the spell aloud - and a door will open, a trap will trigger, or an enemy will fall. Pretend to be one of them. Sabotage. Kill. You have everything you need to expose the other one. But will the others believe you?
Features
- Multi-player
- PvP
- Online PvP
- Co-op
- Online Co-op
- Steam Achievements
- Camera Comfort
- Custom Volume Controls






Release details
Alterum is a Action and Indie game by Hot Winter. Alterum came out on Tuesday, 13 October 2026 on PC. This date comes from Steam and was last checked on 11 October 2026.
Frequently asked questions
When did Alterum come out?
Alterum came out on 13 October 2026.
Which platforms is Alterum on?
Alterum is on PC.
Who makes Alterum?
Alterum is developed by Hot Winter.
What kind of game is Alterum?
Alterum is a game of these genres: Action and Indie.