Get the opportunity to kill Abbott.

Find Pope Joe and let him perform the eye shine surgery.

Find Rust and kill him.

Defeat 20 enemies by shooting from the hip (without aiming with L1)

Finish the game in Easy Mode

Find 40 treasures

Defeat 30 enemies with the Desert - 5

Defeat 70 enemies with the M4

Find 30 treasures

Defeat 50 enemies with hand-to-hand combat

Find 20 treasures

Defeat three enemies with one explosion

Find ten treasures