Prove your worth to the Temporal Guardian Initiative(TGI) and farm 1000 zombie kills

Keep farming zombies until you've killed 2500 of 'em.

Farm 7500 zombie kills and you might lose your rookie status in the TGI.

Declare yourself a top asset for the TGI and farm 20000 zombie kills.

Become a legend of the Temporal Guardian Initiative by farming 50000 zombie kills

Take down 250 zombies with a headshot

Take down 1000 zombies with a headshot

Take down 3000 zombies with a headshot

Take down 7500 zombies with a headshot

Take down 15000 zombies with a headshot

Clear out 500 zombies from close range using melee weapons

Clear out 1500 zombies from close range using melee weapons

Clear out 5000 zombies from close range using melee weapons

Clear out 10000 zombies from close range using melee weapons

Clear out 20000 zombies from close range using melee weapons

Survive for 50 rounds of the undead coming for you

Survive for 200 rounds of the undead coming for you

Survive for 500 rounds of the undead coming for you

Survive for 1000 rounds of the undead coming for you

Survive for 2500 rounds of the undead coming for you

Revive 25 teammates in a coop match

Revive 50 teammates in a coop match

Revive 75 teammates in a coop match

Revive 125 teammates in a coop match