Games like Agonize
Games like Agonize include Escape the Backrooms, DEVOUR, Dead by Daylight, Phasmophobia, and Inside the Backrooms. We matched them by the tags players give Agonize on Steam (Horror, Online Co-Op, Multiplayer, Survival Horror, and Psychological Horror): closest matches first, and among equally close ones the better-known games.

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

DEVOUR
Shared: Horror · Online Co-Op · Multiplayer

Dead by Daylight
Shared: Horror · Multiplayer · Survival Horror

Phasmophobia
Shared: Horror · Online Co-Op · Multiplayer

Inside the Backrooms
Shared: Horror · Multiplayer · Survival Horror

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

Pacify
Shared: Horror · Online Co-Op · Multiplayer

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

Outlast
Shared: Horror · Survival Horror · Psychological Horror

The Outlast Trials
Shared: Horror · Multiplayer · Survival Horror

Poppy Playtime
Shared: Horror · Survival Horror · Psychological Horror

In Silence
Shared: Horror · Online Co-Op · Multiplayer

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

Outlast 2
Shared: Horror · Survival Horror · Psychological Horror

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

BIGFOOT
Shared: Horror · Multiplayer · Online Co-Op

Little Nightmares II
Shared: Horror · Psychological Horror · Multiplayer

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

Demonologist
Shared: Horror · Online Co-Op · Multiplayer

GTFO
Shared: Horror · Online Co-Op · Multiplayer

Content Warning
Shared: Horror · Online Co-Op · Multiplayer

Little Nightmares III
Shared: Horror · Multiplayer · Co-op

Left 4 Dead 2
Shared: Multiplayer · Online Co-Op · Co-op

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