Games like Trooper 1
Games like Trooper 1 include Black Mesa, Bright Memory: Infinite, Half-Life 2, BioShock Infinite, and KovaaK's. We matched them by the tags players give Trooper 1 on Steam (Action, Indie, First-Person, Sci-fi, and Shooter): closest matches first, and among equally close ones the better-known games.
Black Mesa
Shared: Action · Sci-fi · First-Person
Bright Memory: Infinite
Shared: Action · Indie · Shooter
Half-Life 2
Shared: Action · Sci-fi · First-Person
BioShock Infinite
Shared: Action · First-Person · Shooter
KovaaK's
Shared: Action · Indie · Shooter
Apex Legends™
Shared: First-Person · Action · Shooter
SUPERHOT
Shared: Action · Indie · First-Person
Starship Troopers: Extermination
Shared: Action · Sci-fi · First-Person
DOOM
Shared: Action · Shooter · First-Person
Bright Memory
Shared: Action · First-Person · Shooter
STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Shooter · Sci-fi
Titanfall® 2
Shared: Action · Shooter · Sci-fi
My Friend Pedro
Shared: Action · Indie · Shooter
Halo Infinite
Shared: Action · Shooter · First-Person
Aimlabs
Shared: Action · Shooter · First-Person
Call of Duty®: Black Ops III
Shared: Action · Shooter · First-Person
Grand Theft Auto V Legacy
Shared: Action · First-Person · Shooter
Half-Life: Opposing Force
Shared: Action · Sci-fi · First-Person
Hard Reset Extended Edition
Shared: Action · Sci-fi · Indie
Angels Fall First
Shared: Action · Indie · Sci-fi
Interstellar Marines
Shared: Action · Indie · Sci-fi
Half-Life: Blue Shift
Shared: Action · Sci-fi · Shooter
Half-Life
Shared: Sci-fi · Action · Shooter
ORION: Prelude
Shared: Action · Indie · Shooter