Games like Project Silverfish
Games like Project Silverfish include Fallout 4, Metro Exodus, Prey, S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition, and Choo-Choo Charles. We matched them by the tags players give Project Silverfish on Steam (FPS, Immersive Sim, Exploration, Sandbox, and Shooter): closest matches first, and among equally close ones the better-known games.
Fallout 4
Shared: Exploration · Shooter · FPS
Metro Exodus
Shared: FPS · Horror · Atmospheric
Prey
Shared: Immersive Sim · FPS · Horror
S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition
Shared: FPS · Exploration · Shooter
Choo-Choo Charles
Shared: Horror · Shooter · FPS
Far Cry® 5
Shared: FPS · Shooter · Exploration
METRO 2033 Redux
Shared: FPS · Horror · Atmospheric
METRO Last Light Redux
Shared: FPS · Horror · Atmospheric
Twisted Tower
Shared: Exploration · FPS · Shooter
The Forest
Shared: Horror · Exploration · Sandbox
Far Cry® 2
Shared: FPS · Shooter · Open World
Black Mesa
Shared: FPS · Shooter · Sci-fi
Gloomwood
Shared: Immersive Sim · FPS · Exploration
Half-Life 2
Shared: FPS · Shooter · Sci-fi
BioShock™ Remastered
Shared: FPS · Horror · Atmospheric
Far Cry® 6
Shared: FPS · Shooter · Exploration
Atomic Heart
Shared: FPS · Horror · Shooter
Amnesia: The Bunker
Shared: Immersive Sim · Horror · Atmospheric
Far Cry 3
Shared: FPS · Shooter · Open World
Subnautica 2
Shared: Exploration · Horror · Survival Horror
Crysis Remastered
Shared: FPS · Shooter · Sandbox
Resident Evil Requiem
Shared: FPS · Horror · Survival Horror
System Shock
Shared: Immersive Sim · FPS · Horror
Far Cry® 4
Shared: FPS · Shooter · Open World