Complete a mission in the game.
Complete 4 missions in the game.
Finish all the missions in the game.
Complete a mission in 2 player local game mode.
Complete an online multiplayer game.
Heal a character on the ground 10 times in multiplayer mode.
Win the golden glove on one mission.
Win the golden glove on 4 missions.
Get the gold in every mission.
Complete a mission without taking a single hit.
Complete all the missions in the game in "Rock hard" mode.
Find 12 cans.
Find a new weapon.
Find all weapons with the same character.
Launch the 4 special skills specific to one character in a single mission.
Exterminate 3 hordes.
Exterminate 10 hordes.
Exterminate 50 hordes.
Achieve a 10,000 point combo.
Achieve a 25,000 point combo.
Achieve a 50,000 point combo.
Achieve a 100,000 point combo.
Score 200,000 points in a single game.
Score 300,000 points in a single game.
Score 400,000 points in a single game.
Kill 500 monsters.
Kill 1,000 monsters.
Kill 2,500 monsters.
Kill 250 monsters with the chainsaw.
Kill 500 monsters with the chainsaw.
Kill 150 monsters with fire.
Kill 300 monsters with fire.