Games like Horror in the forest
Games like Horror in the forest include Left 4 Dead 2, S.T.A.L.K.E.R. 2: Heart of Chornobyl - Standard Edition, METRO Last Light Redux, METRO 2033 Redux, and Metro Exodus. We matched them by the tags players give Horror in the forest on Steam (Action, Walking Simulator, Survival Horror, FPS, and Investigation): closest matches first, and among equally close ones the better-known games.

Left 4 Dead 2
Shared: FPS · Action · Shooter

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

METRO Last Light Redux
Shared: Action · FPS · Atmospheric

METRO 2033 Redux
Shared: FPS · Action · Atmospheric

Metro Exodus
Shared: FPS · Action · Atmospheric

Call of Duty®: Black Ops III
Shared: Action · FPS · Shooter

Half-Life 2
Shared: Action · FPS · Shooter

Apex Legends™
Shared: FPS · Action · Shooter

PUBG: BATTLEGROUNDS
Shared: Shooter · FPS · Action

Resident Evil Requiem
Shared: Survival Horror · Action · FPS

Black Mesa
Shared: Action · FPS · Shooter

DayZ
Shared: Shooter · Survival · FPS

Call of Duty®
Shared: FPS · Action · Shooter

Paladins®
Shared: Action · FPS · Hero Shooter

Fallout 4
Shared: Exploration · Action · Shooter

DOOM
Shared: Action · FPS · Shooter

Insurgency: Sandstorm
Shared: FPS · Action · Shooter

S.T.A.L.K.E.R.: Shadow of Chornobyl - Enhanced Edition
Shared: Action · FPS · Shooter

BioShock Infinite
Shared: Action · FPS · Shooter

Resident Evil 4
Shared: Action · Survival Horror · Survival

Resident Evil Village
Shared: Survival Horror · Action · FPS

Call of Duty®: Infinite Warfare
Shared: Action · FPS · Shooter

Far Cry® 2
Shared: Action · FPS · Shooter

Deep Rock Galactic
Shared: FPS · Shooter · Action