Phasmophobia is described as '4 player online co-op psychological horror where you and your team members of paranormal investigators will enter haunted locations filled with paranormal activity and gather as much evidence of the paranormal as you can'. There are more than 10 games similar to Phasmophobia for a variety of platforms, including Windows, Steam, Playstation, Nintendo Switch and Xbox. The best alternative is Amnesia: The Dark Descent. It's not free, so if you're looking for a free alternative, you could try Identity V or They That Feast. Other Phasmophobia like games are Dead by Daylight (Paid), Metro Exodus (Paid), Sanitarium (Paid) and The Blackout Club (Paid).
Amnesia: The Dark Descent is a first person survival horror game for Windows, Mac OS X and Linux. The game features a protagonist named Daniel exploring a dark and foreboding castle, while avoiding monsters and other obstructions as well as solving puzzles.
Dead by Daylight is a multiplayer (4vs1) horror game where one player takes on the role of the savage Killer, and the other four players play as Survivors, trying to escape the Killer and avoid being caught and killed.
The year is 2036. A quarter-century after nuclear war devastated the earth, a few thousand survivors still cling to existence beneath the ruins of Moscow, in the tunnels of the Metro. Represent entire series of Metro Exodus games.
A horror game that is available in two modes. Online mode lets one or more players take on the role of animatronics, ready to crush everyone and everything. The other three are survivors. How did this happen? You’ll have to find out!.
A procedurally-generated apocalypse in which only The Light can save us. Use stealth and evasion to avoid terrifying machines that patrol the desolate world, and employ the powers of Light to unpick their deadly traps.