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Alterum

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About Alterum

Alterum is a multiplayer game for 4–8 players about a team of explorers at a new site, where some of their colleagues become possessed by restless spirits and are now “altered.” You must work out who you can trust while trying to convince the others of what you discover.

Speak your spells

Spells are spoken aloud, and each has consequences for you and everyone nearby. Uttering one can open a door, trigger a trap or make an enemy fall.

Deception and sabotage

You can pretend to be one of the altered, sabotage and kill. You have what you need to expose the other one, but the others may not believe you.

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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