Games like Gun-REViper
Games like Gun-REViper include Titanfall® 2, Half-Life 2, Black Mesa, Bright Memory: Infinite, and DEVIL BLADE REBOOT. We matched them by the tags players give Gun-REViper on Steam (Shoot 'Em Up, Action, Shooter, Sci-fi, and Mechs): closest matches first, and among equally close ones the better-known games.

Titanfall® 2
Shared: Shooter · Mechs · Action

Half-Life 2
Shared: Action · Sci-fi · Shooter

Black Mesa
Shared: Action · Sci-fi · Shooter

Bright Memory: Infinite
Shared: Action · Shooter · Singleplayer

DEVIL BLADE REBOOT
Shared: Shoot 'Em Up · Action · Shooter

BioShock Infinite
Shared: Action · Shooter · Singleplayer

STAR WARS™ Battlefront™ II
Shared: Shooter · Singleplayer · Action

Halo Infinite
Shared: Shooter · Action · Singleplayer

Vanquish
Shared: Action · Sci-fi · Shooter

EARTH DEFENSE FORCE 6
Shared: Action · Shooter · Sci-fi

Intrusion 2
Shared: Action · Shooter · Sci-fi

ARMORED CORE™ VI FIRES OF RUBICON™
Shared: Action · Mechs · Sci-fi

Zombotron
Shared: Action · Shooter · Singleplayer

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Shooter · Sci-fi

Half-Life
Shared: Sci-fi · Shooter · Action

DOOM: The Dark Ages
Shared: Action · Singleplayer · Sci-fi

Half-Life: Blue Shift
Shared: Action · Sci-fi · Shooter

My Friend Pedro
Shared: Action · Shooter · Indie

Crysis Remastered
Shared: Action · Shooter · Sci-fi

Half-Life: Opposing Force
Shared: Action · Sci-fi · Shooter

DRAINUS
Shared: Shoot 'Em Up · Action · Shooter

DOOM
Shared: Action · Shooter · Sci-fi

KovaaK's
Shared: Action · Shooter · Singleplayer

Greedland
Shared: Shoot 'Em Up · Sci-fi · Mechs