Games like Halo 2: Anniversary
Games like Halo 2: Anniversary include Halo: The Master Chief Collection, Half-Life 2, Black Mesa, DOOM, and Half-Life. We matched them by the tags players give Halo 2: Anniversary on Steam (Action, FPS, Classic, Multiplayer, and Sci-fi): closest matches first, and among equally close ones the better-known games.

Halo: The Master Chief Collection
Shared: Great Soundtrack · FPS · Classic

Half-Life 2
Shared: Action · FPS · Classic

Black Mesa
Shared: Action · FPS · Sci-fi

DOOM
Shared: Action · FPS · Great Soundtrack

Half-Life
Shared: FPS · Classic · Action

DOOM Eternal
Shared: Action · FPS · Great Soundtrack

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

Call of Duty®
Shared: FPS · Action · Multiplayer

Halo Infinite
Shared: FPS · Multiplayer · Action

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

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Multiplayer · Classic

STAR WARS™ Republic Commando™
Shared: Action · FPS · Sci-fi

Call of Duty® 4: Modern Warfare® (2007)
Shared: Action · FPS · Multiplayer

Call of Duty®: Modern Warfare® 2 (2009)
Shared: Action · FPS · Multiplayer

Titanfall® 2
Shared: FPS · Multiplayer · Action

BioShock Infinite
Shared: Action · FPS · Shooter

Red Dead Redemption 2
Shared: Action · Multiplayer · Story Rich

Call of Duty®: Modern Warfare®
Shared: Action · FPS · Multiplayer

Battlefield™ 1
Shared: FPS · Multiplayer · Action

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

PAYDAY 2
Shared: Action · FPS · Multiplayer

Left 4 Dead 2
Shared: FPS · Action · Multiplayer

Quake
Shared: Action · FPS · Classic

Quake II
Shared: Action · FPS · Classic