MIMESIS is an online co-op horror game in which monsters imitate the people you trust. Players venture through a building to gather valuable finds and bring them back to the tram, while uncertainty over whether a companion is genuine turns teamwork into a test of suspicion. The game requires a microphone, and its store description recommends playing with four people using a headset or earphones.
The danger extends beyond the impostors. Contaminated rain threatens anyone caught outside after nightfall, making the tram the only shelter and midnight the deadline for getting back. Staying out too long can transform a player into a monster, so each trip pairs the search for loot with the risk of exposure. Players can also restore power to a dormant service station and spend what they have collected to buy and upgrade equipment, with stronger gear aiding survival.
The number matters here as a guide to the intended social setup, not as a description of solo play. The central tension comes from working together while questioning whether the teammate beside you is still your friend.