Games like LEAP
Games like LEAP include Titanfall® 2, Black Mesa, Half-Life 2, Starship Troopers: Extermination, and Call of Duty®. We matched them by the tags players give LEAP on Steam (Action, Sci-fi, First-Person, FPS, and Funny): closest matches first, and among equally close ones the better-known games.

Titanfall® 2
Shared: FPS · Action · Sci-fi

Black Mesa
Shared: Action · FPS · Sci-fi

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

Starship Troopers: Extermination
Shared: Action · Sci-fi · FPS

Call of Duty®
Shared: FPS · Action · First-Person

Ravenfield
Shared: FPS · Action · First-Person

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

Garry's Mod
Shared: Funny · First-Person · Casual

Apex Legends™
Shared: FPS · First-Person · Action

Arma 3
Shared: Action · Military · First-Person

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

Squad
Shared: FPS · Military · Action

Halo Infinite
Shared: FPS · Action · First-Person

Half-Life 2: Deathmatch
Shared: Action · FPS · First-Person

BioShock Infinite
Shared: Action · First-Person · FPS

LOCKDOWN Protocol
Shared: Action · First-Person · Sci-fi

Insurgency: Sandstorm
Shared: FPS · Action · First-Person

Halo: Campaign Evolved
Shared: Action · FPS · Sci-fi

DOOM
Shared: Action · FPS · First-Person

Battlefield™ 2042
Shared: FPS · Action · First-Person

Bright Memory: Infinite
Shared: Action · FPS · Sci-fi

Halo: The Master Chief Collection
Shared: FPS · Sci-fi · First-Person

DOOM Eternal
Shared: Action · FPS · First-Person

Angels Fall First
Shared: Action · Sci-fi · FPS