Games like R.I.P.
Games like R.I.P. include Lethal Company, PEAK, Content Warning, R.E.P.O., and Pacify. We matched them by the tags players give R.I.P. on Steam (Exploration, Time Management, Procedural Generation, Futuristic, and Online Co-Op): closest matches first, and among equally close ones the better-known games.

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

PEAK
Shared: Online Co-Op · Exploration · Procedural Generation

Content Warning
Shared: Exploration · Procedural Generation · Online Co-Op

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

Pacify
Shared: Online Co-Op · Exploration · Horror

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

No Man's Sky
Shared: Exploration · Procedural Generation · Sci-fi

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

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

Subnautica 2
Shared: Exploration · Horror · Survival

Subnautica
Shared: Exploration · Horror · Survival

Sons Of The Forest
Shared: Exploration · Survival · Horror

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

Deep Rock Galactic
Shared: Procedural Generation · Exploration · First-Person

Murky Divers
Shared: Exploration · Online Co-Op · Horror

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

Abiotic Factor
Shared: Online Co-Op · Exploration · Survival

Green Hell
Shared: Online Co-Op · Survival · Exploration

Subnautica: Below Zero
Shared: Exploration · Survival · Singleplayer

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

The Forest
Shared: Horror · Exploration · Survival

Labyrinthine
Shared: Online Co-Op · Procedural Generation · Horror

RV There Yet?
Shared: Online Co-Op · Exploration · First-Person

Dead Space™ 3
Shared: Online Co-Op · Horror · Sci-fi