Games like The Silent Expedition Echo Protocol
Games like The Silent Expedition Echo Protocol include Lethal Company, Escape the Backrooms, Backrooms: Escape Together, Pacify, and Phasmophobia. We matched them by the tags players give The Silent Expedition Echo Protocol on Steam (Online Co-Op, Survival Horror, Action, Psychological Horror, and Adventure): closest matches first, and among equally close ones the better-known games.

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

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

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

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

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

Inside the Backrooms
Shared: Survival Horror · Co-op · Horror

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

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

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

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

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

Outlast
Shared: Survival Horror · Horror · Psychological Horror

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

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

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

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

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

The Forest
Shared: Horror · Survival Horror · Adventure

Subnautica 2
Shared: Co-op · Horror · Survival Horror

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

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

Poppy Playtime
Shared: Horror · Survival Horror · Psychological Horror

Sons Of The Forest
Shared: Co-op · Survival Horror · Horror

In Silence
Shared: Online Co-Op · Co-op · Survival Horror