Games like Fossilfuel 2
Games like Fossilfuel 2 include Fallout 4, Ready or Not, Five Nights at Freddy's: Security Breach, Metro Exodus, and BioShock Infinite. We matched them by the tags players give Fossilfuel 2 on Steam (Dinosaurs, Shooter, Horror, Singleplayer, and Multiple Endings): closest matches first, and among equally close ones the better-known games.

Fallout 4
Shared: Singleplayer · Shooter · Exploration

Ready or Not
Shared: Shooter · Singleplayer · Horror

Five Nights at Freddy's: Security Breach
Shared: Horror · Singleplayer · Multiple Endings

Metro Exodus
Shared: Singleplayer · FPS · Horror

BioShock Infinite
Shared: Shooter · Singleplayer · FPS

S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: Shooter · Singleplayer · FPS

METRO 2033 Redux
Shared: Horror · FPS · Singleplayer

Half-Life: Alyx
Shared: Horror · Shooter · FPS

Half-Life 2
Shared: Singleplayer · Shooter · FPS

METRO Last Light Redux
Shared: Horror · FPS · Singleplayer

Atomic Heart
Shared: Singleplayer · Horror · FPS

Call of Duty®
Shared: Shooter · Singleplayer · FPS

Fallout: New Vegas
Shared: Singleplayer · Exploration · RPG

Black Mesa
Shared: Shooter · FPS · Singleplayer

BioShock™
Shared: Singleplayer · Horror · FPS

Poppy Playtime
Shared: Horror · Singleplayer · Puzzle

BioShock™ Remastered
Shared: Horror · Singleplayer · FPS

BioShock™ 2 Remastered
Shared: Singleplayer · Horror · FPS

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

My Friendly Neighborhood
Shared: Singleplayer · Horror · Puzzle

Cyberpunk 2077
Shared: Singleplayer · FPS · RPG

In Sound Mind
Shared: Horror · Puzzle · Singleplayer

BioShock® 2
Shared: Singleplayer · Horror · FPS

Trepang2
Shared: Shooter · Singleplayer · Horror