Finish the game in Normal Mode

Defeat 30 enemies with the T-Bolt Sniper

Defeat 30 enemies with the PAK-80

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

Play in the swimming pool on the Cruise Ship

Defeat 20 enemies with gunfire by aiming while hanging

Find 20 treasures

Defeat five Riot Shield enemies by running over their shield

Defeat 30 enemies with the Mag 5

Defeat five enemies in a row using stealth attacks

Defeat 20 enemies with hand-to-hand combat

Defeat five enemies in a row with headshots

Kill a zombie with 10 different melee weapons.