Gain a star in any event of 'No Limits'.

Find 60 collectibles.

Eradicate the infestation

Stop a squad member from suffocating in single player

Kill 25 zombies with your bare fists.

Kill 250 zombies with modified weapons.

Complete act 1.

Drive a total distance of 10 kilometers.

Travel a distance of 20 kilometers on foot.

Kill 50 zombies using a vehicle.

Reach level 10.

Use a hammer to kill a series of 15 zombies without taking damage.