In Ascension, escape on all 3 lunar landers.

Kill Poseidon

Defeat 20 enemies with the Pistole

Help Billy get his bike back. (The Lost and Damned)

Kill a Rockstar or someone with this Trophy in a public multiplayer match.

Defeat 30 enemies with Mk-NDI grenades

Defeat 20 enemies with headshots

Defeat 50 enemies with hand-to-hand combat

Defeat 20 enemies with hand-to-hand combat

Play Zork on the terminal.

Wreck a Cop

Fill the Nitrous bar then use it all in one go without hitting anything