Reach wave 5.

Reach wave 10.

Reach wave 15.

Reach wave 20.

Beat the boss and save the world.

Beat the boss with the assault rifle.

Beat the boss with the pistol.

Beat the boss with the shotgun.

Beat the boss with the sniper rifle.

Own every gun.

Max out one of Chuck's stats.

Max out one gun stat.

Grow the mullet to maximum length.

Spend $5,000 at the store.

Clear wave 5 or later without taking damage.

Complete a sector without losing a single citizen.

Kill 25 aliens with one canister detonation.

Kill 5,000 aliens.

Kill 100,000 aliens.

Kill 1,000,000 aliens.

Fire 100,000 bullets.

Fire 250,000 bullets.

Die 25 times.

Collect $15,000 in lifetime loot.

Kill 10,000 aliens in a single run.