Games like Cthulhu's Reach: Devil Reef
Games like Cthulhu's Reach: Devil Reef include Lethal Company, Content Warning, SYNTHETIK: Legion Rising, Heroes of Hammerwatch, and Gunfire Reborn. We matched them by the tags players give Cthulhu's Reach: Devil Reef on Steam (Action Roguelike, Online Co-Op, Lovecraftian, Roguelite, and Horror): closest matches first, and among equally close ones the better-known games.

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

Content Warning
Shared: Online Co-Op · Action Roguelike · Horror

SYNTHETIK: Legion Rising
Shared: Roguelite · Action Roguelike · Online Co-Op

Heroes of Hammerwatch
Shared: Action Roguelike · Roguelite · Co-op

Gunfire Reborn
Shared: Roguelite · Online Co-Op · Co-op

PEAK
Shared: Online Co-Op · Co-op · Action Roguelike

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

Ember Knights
Shared: Action Roguelike · Roguelite · Co-op

Risk of Rain 2
Shared: Action Roguelike · Co-op · Roguelite

20 Minutes Till Dawn
Shared: Action Roguelike · Roguelite · Horror

Ravenswatch
Shared: Action Roguelike · Online Co-Op · Co-op

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

Enter the Gungeon
Shared: Action Roguelike · Dungeon Crawler · Co-op

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

Hades
Shared: Action Roguelike · Roguelite · Indie

Streets of Rogue
Shared: Action Roguelike · Roguelite · Co-op

Children of Morta
Shared: Online Co-Op · Action Roguelike · Roguelite

Shape of Dreams
Shared: Action Roguelike · Co-op · Roguelite

SWORN
Shared: Action Roguelike · Roguelite · Co-op

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

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

The Spell Brigade
Shared: Online Co-Op · Roguelite · Action Roguelike

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

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Dungeon Crawler · Indie