Upgrade your melee weapon again!

Kill 10 Spitters with a ranged weapon.

Complete Mission 7 - Beauty And The Beast.

Collect 25 ammo packs.

Complete the first rank of all non-level-specific challenges with a single character.

Kill 50 zombies using a melee weapon.

Kill 100 zombies in total.

Acquire the walloper

Gunzerk continuously for 90 seconds.

Stealth kill 25 zombies.

Acquire the combat flashlight.

Acquire the pistol.

Acquire the two-way radio.