Games like AquaNox
Games like AquaNox include Half-Life 2, Half-Life, STAR WARS™ Battlefront II (Classic, 2005), STAR WARS™ Battlefront™ II, and Titanfall® 2. We matched them by the tags players give AquaNox on Steam (Action, Underwater, Singleplayer, Sci-fi, and 6DOF): closest matches first, and among equally close ones the better-known games.
Half-Life 2
Shared: Action · Sci-fi · Singleplayer
Half-Life
Shared: Sci-fi · Singleplayer · Action
STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Sci-fi · Shooter
STAR WARS™ Battlefront™ II
Shared: Singleplayer · Action · Shooter
Titanfall® 2
Shared: Singleplayer · Action · Shooter
Black Mesa
Shared: Action · Sci-fi · Singleplayer
Halo Infinite
Shared: Singleplayer · Action · Multiplayer
Call of Duty®: Black Ops III
Shared: Action · Singleplayer · Multiplayer
Call of Duty®
Shared: Action · Singleplayer · Shooter
Halo: The Master Chief Collection
Shared: Sci-fi · Multiplayer · Action
DOOM
Shared: Action · Shooter · Singleplayer
Arma 3
Shared: Action · Shooter · Multiplayer
Grand Theft Auto V Legacy
Shared: Action · Multiplayer · Singleplayer
STAR WARS™ Jedi Knight - Jedi Academy™
Shared: Action · Sci-fi · Singleplayer
STAR WARS™ Republic Commando™
Shared: Action · Sci-fi · Singleplayer
RoboCop: Rogue City
Shared: Action · Singleplayer · Cyberpunk
Half-Life: Opposing Force
Shared: Action · Sci-fi · Singleplayer
Crysis 2 - Maximum Edition
Shared: Action · Sci-fi · Singleplayer
Battlefield™ 6
Shared: Singleplayer · Action · Multiplayer
Barotrauma
Shared: Underwater · Multiplayer · Sci-fi
HELLDIVERS™ 2
Shared: Action · Shooter · Sci-fi
KovaaK's
Shared: Action · Shooter · Singleplayer
Half-Life: Blue Shift
Shared: Action · Singleplayer · Sci-fi
Feed and Grow: Fish
Shared: Underwater · Action · Simulation