Finish the bar room brawl

Collect 500 coins

Kill 30 enemies while they're suspended in the air with the grappling hook.

Kill 5 enemies with the melee attack while they're suspended with the grappling hook.

Kill 30 enemies while they're falling through the air.

Kill 20 enemies in 60 seconds.

Defeat 20 enemies by blind-firing while in cover (without aiming with L1/R1)

Defeat 30 enemies with the KAL 7

Make five enemies drop their grenade by shooting them

Defeat 50 enemies with hand-to-hand combat

Defeat five enemies in a row with headshots

Defeat 75 enemies in a row without dying

Find one treasure