Games like Truth Seekers
Games like Truth Seekers include Lethal Company, Left 4 Dead 2, Dead by Daylight, Escape the Backrooms, and Dying Light. We matched them by the tags players give Truth Seekers on Steam (Online Co-Op, Horror, First-Person, 1990's, and Atmospheric): closest matches first, and among equally close ones the better-known games.

Lethal Company
Shared: Online Co-Op · Horror · First-Person

Left 4 Dead 2
Shared: Online Co-Op · Horror · Action

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

Escape the Backrooms
Shared: Horror · Online Co-Op · First-Person

Dying Light
Shared: Horror · Online Co-Op · Survival Horror

Outlast
Shared: Horror · First-Person · Atmospheric

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

Resident Evil 7 Biohazard
Shared: Horror · First-Person · Survival Horror

GTFO
Shared: Online Co-Op · Horror · Survival Horror

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

BIGFOOT
Shared: Horror · Online Co-Op · Survival Horror

Resident Evil Village
Shared: Horror · First-Person · Survival Horror

Nuclear Nightmare
Shared: Online Co-Op · Horror · First-Person

Species: Unknown
Shared: Online Co-Op · Horror · First-Person

Back 4 Blood
Shared: Online Co-Op · Horror · Multiplayer

Call of Duty®
Shared: First-Person · Action · Shooter

Ready or Not
Shared: Horror · Shooter · First-Person

METRO 2033 Redux
Shared: Horror · Atmospheric · First-Person

The Outlast Trials
Shared: Horror · First-Person · Survival Horror

Phasmophobia
Shared: Online Co-Op · Horror · First-Person

Pacify
Shared: Online Co-Op · Horror · First-Person

Half-Life
Shared: 1990's · First-Person · Action

Left 4 Dead
Shared: Horror · Online Co-Op · Action

Grand Theft Auto V Legacy
Shared: Action · First-Person · Multiplayer