Shark Attack Deathmatch 2

It's optimized very well, and the detail of the visuals in the games are actually VERY good.

This also contributes to the empty online lobbies, which is a shame, as a full co-op or versus mode could take this game to a whole new level.

Depth definitely has the better shark gameplay, but this game does cleverly separate it's gameplay style by having a first person view from within the shark's mouth instead of it being third person like it is in Depth.

This mixture of combat and natural predation is the game’s signature twist, lending the experience a unique tension that few shooters attempt.

While 3D movements might not be new in the space shooter genre, it is a unique addition to the FPS realm.

The feeling of being underwater with limited supply of oxygen, the sounds, the soundtrack (which reflects any environmental changes, i.e. an approaching shark from a distance and/or a shark that is very close to you and/or is about to take a bite off your stinky human flesh).