Reach 50% completion in the normal mode or mercenary mode.

Kill 10 zombies in a row with headshots.

Explore the entire island.

Kill a Suicider with a grenade.

Find 120 collectibles.

Complete act II.

Heal yourself with a medkit 100 times.

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

Kill 250 zombies with modified weapons.

Finish 75 quests cumulatively.

Customize 25 weapons.

Find 60 collectibles.

Drive a total distance of 10 kilometers.