Kill a Suicider with a grenade.

Find 60 collectibles.

Kill 5 Infected in a row with a single blow.

Kill 250 zombies using edged melee weapons.

Complete act 1.

Kill 250 zombies with modified weapons.

Complete 25 quests while playing with at least one co-op partner.

Kill 50 zombies using a vehicle.

Reach level 10.

Travel a distance of 20 kilometers on foot.

Complete 5 quests in a single co-op game with the same partners.

Complete the first tier of every Survivor Challenge.