Games like Chasm: The Rift
Games like Chasm: The Rift include Warhammer 40,000: Boltgun, DOOM Eternal, DOOM + DOOM II, DOOM, and Quake. We matched them by the tags players give Chasm: The Rift on Steam (FPS, Retro, Old School, Shooter, and Action): closest matches first, and among equally close ones the better-known games.

Warhammer 40,000: Boltgun
Shared: FPS · Retro · Shooter

DOOM Eternal
Shared: FPS · Gore · Action

DOOM + DOOM II
Shared: FPS · Retro · Action

DOOM
Shared: FPS · Shooter · Action

Quake
Shared: FPS · Shooter · Action

CULTIC
Shared: FPS · Old School · Shooter

Half-Life
Shared: FPS · Shooter · Singleplayer

DUSK
Shared: FPS · Retro · Shooter

HROT
Shared: FPS · Retro · Shooter

Call of Duty®
Shared: FPS · Shooter · Action

DOOM 64
Shared: FPS · Action · Retro

BioShock Infinite
Shared: FPS · Shooter · Action

Wolfenstein II: The New Colossus
Shared: FPS · Action · Gore

Trepang2
Shared: FPS · Shooter · Singleplayer

RoboCop: Rogue City
Shared: FPS · Action · Singleplayer

Wolfenstein: The New Order
Shared: FPS · Action · Shooter

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

Titanfall® 2
Shared: FPS · Shooter · Action

Black Mesa
Shared: FPS · Action · Shooter

Half-Life 2
Shared: FPS · Action · Shooter

WRATH: Aeon of Ruin
Shared: FPS · Retro · Action

Quake II
Shared: FPS · Action · Shooter

Ready or Not
Shared: FPS · Shooter · Singleplayer

Half-Life: Opposing Force
Shared: FPS · Action · Shooter