The Missile Crisis

 is the final level of the Bunker chapter.

Don't get hit by an explosion
Reward: XP

Self-explanatory.

Find and open all the treasure chests
Reward: XP


 * To the right of the starting position, beyond the gate.
 * Behind the blast shield, where the first bomb falls.
 * Near the first UAV you fight, down near the sliding laser turrets.
 * After passing through the container/bridge.
 * Final chest.

Beat Private Corpsepile in under 45 seconds
Reward: Lewis Carroll's Looking Glass

Self-explanatory. Note that you have to wear him down and then kill all of his individual components, not just the main course.

Find and destroy all the Zombie Chickens
Reward: XP


 * To the right of the starting position, on the sandbags.
 * Right in front of you as you move forward from the previous location. Also on the sandbags.
 * In the are are with the bomb.
 * Right after the Nibble gauntlet, next to the forklift.
 * Right after the laser gauntlet, beyond the gate you open with the switch.

Complete the entire level in nine minutes or less
Reward: XP

Self-explanatory.

Avoid the lasers
Reward: Spartacustard

Self-explanatory.