Games like Altered Algorithm
Games like Altered Algorithm include Aimlabs, BONELAB, BONEWORKS, PUBG: BATTLEGROUNDS, and BioShock Infinite. We matched them by the tags players give Altered Algorithm on Steam (Action, Adventure, FMV, Simulation, and FPS): closest matches first, and among equally close ones the better-known games.

Aimlabs
Shared: Action · FPS · Simulation

BONELAB
Shared: VR · Action · Shooter

BONEWORKS
Shared: Action · VR · Adventure

PUBG: BATTLEGROUNDS
Shared: Action · Shooter · FPS

BioShock Infinite
Shared: Action · FPS · Adventure

Far Cry® 6
Shared: Action · FPS · Adventure

Half-Life 2
Shared: Action · FPS · Adventure

Half-Life: Alyx
Shared: VR · FPS · Action

Far Cry® 5
Shared: FPS · Shooter · Action-Adventure

Atomic Heart
Shared: Adventure · Action · FPS

VLADiK BRUTAL
Shared: Action · FPS · Adventure

Fallout 4
Shared: Adventure · Exploration · Action

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

Five Nights at Freddy's: Secret of the Mimic
Shared: Adventure · Action · VR

Hard Bullet
Shared: Action · VR · Simulation

KovaaK's
Shared: Action · Simulation · FPS

Far Cry 3
Shared: Action · Adventure · FPS

Far Cry® 4
Shared: Action · Adventure · FPS

Black Mesa
Shared: Action · FPS · Shooter

Rise of the Tomb Raider™
Shared: Action · Adventure · Exploration

Apex Legends™
Shared: Action · FPS · Shooter

A Plague Tale: Requiem
Shared: Action · Adventure · Exploration

Bodycam
Shared: FPS · Shooter · VR

Tomb Raider Game of the Year
Shared: Action · Adventure · Exploration