10 Tis but a flesh wound!Sever 100 limbs.
10 Road TripDrive a total distance of 10 kilometers.
10 People PersonPlay with 10 different co-op partners for at least 15 minutes each.
10 OriginalityPlay in a co-op team of 4 different playable characters.
10 Need a hand?Join another player's game.
10 Learning the ropesReach level 10.
10 Gesundheit!Heal yourself with a medkit 100 times.
10 Catch!Kill an Infected with a grenade blast.
10 CardioTravel a distance of 20 kilometers on foot.
10 Together in the lightComplete 5 quests in a single co-op game with the same partners.
10 Warranty Void if UsedCreate a customized weapon.
15 10 heads are better than 1Kill 10 zombies in a row with headshots.
15 HumanitarianKill 50 human enemies.
15 Karma-geddonKill 50 zombies using a vehicle.
15 Knock, knockBreach a locked door with the first blow.
20 Can't touch thisUse a hammer to kill a series of 15 zombies without taking damage.
20 Gotta find'em allFind 60 collectibles.
20 Light my fireSet 10 zombies on fire simultaneously.
20 One is all I needKill 5 Infected in a row with a single blow.
25 A taste of everythingKill a zombie with 10 different melee weapons.
25 Dedicated studentReach level 25.
25 Going steadyComplete 25 quests while playing with at least one co-op partner.
25 Guns don't kill but they helpKill 250 zombies using firearms.
25 Hack & slashKill 250 zombies using edged melee weapons.
25 Ménage à troisComplete 5 quests with 3 co-op partners.
25 Nearly thereFind 120 collectibles.
25 RagemanKill 100 enemies with Fury attacks.
25 Swing them sticksKill 150 enemies using Analog Fighting controls.
25 Tae Kwon LeapKill 25 zombies with your bare fists.
25 To put it bluntlyKill 250 zombies using blunt melee weapons.
30 A very special dayKill 250 zombies with modified weapons.
30 I want one of thoseCustomize 25 weapons.
30 Right 4 LifeComplete act I with 4 different characters.
30 Rootin' Tootin' Lootin'Loot 5 Exceptional Weapons.
30 School of hard knocksReach level 50.
30 Steam PunkCreate weapons to rival the gods of fire or thunder.
30 There and back againExplore the entire island.
60 Busy, busy, busyFinish 75 quests cumulatively.