Games like Astrumis - Survive Together
Games like Astrumis - Survive Together include Lethal Company, Escape the Backrooms, R.E.P.O., Phasmophobia, and Pacify. We matched them by the tags players give Astrumis - Survive Together on Steam (Indie, Horror, Co-op Campaign, Sci-fi, and Online Co-Op): closest matches first, and among equally close ones the better-known games.

Lethal Company
Shared: Horror · Online Co-Op · Co-op

Escape the Backrooms
Shared: Horror · Online Co-Op · Co-op

R.E.P.O.
Shared: Horror · Online Co-Op · Co-op

Phasmophobia
Shared: Horror · Online Co-Op · Co-op

Pacify
Shared: Horror · Online Co-Op · Co-op

The Outlast Trials
Shared: Horror · Co-op · Stealth

Dead by Daylight
Shared: Horror · Online Co-Op · Co-op

Backrooms: Escape Together
Shared: Horror · Online Co-Op · Co-op

PEAK
Shared: Online Co-Op · Co-op · Multiplayer

DEVOUR
Shared: Horror · Online Co-Op · Co-op

Nuclear Nightmare
Shared: Horror · Online Co-Op · Co-op

Inside the Backrooms
Shared: Horror · Co-op · Online Co-Op

Resident Evil 5
Shared: Co-op Campaign · Co-op · Horror

The Headliners
Shared: Horror · Online Co-Op · Indie

Species: Unknown
Shared: Horror · Online Co-Op · Aliens

Starship Troopers: Extermination
Shared: Online Co-Op · Sci-fi · Co-op

Zort
Shared: Horror · Online Co-Op · Co-op

Labyrinthine
Shared: Horror · Online Co-Op · Co-op

Little Nightmares III
Shared: Horror · Co-op · Online Co-Op

Resident Evil 6
Shared: Horror · Co-op · Co-op Campaign

Lunch Lady
Shared: Horror · Online Co-Op · Co-op

PANICORE
Shared: Horror · Online Co-Op · Co-op

Demonologist
Shared: Horror · Online Co-Op · Co-op

How to Fish
Shared: Indie · Online Co-Op · Co-op