Collect 10 hats

Collect 25 hats

Collect 50 hats

Defeat the Sheriff and unlock the shotgun

Defeat the Sniper and unlock the sniper

Defeat the Penguin and unlock the minigun

Overthrow the Alien King

Collect 10 faces

Collect 25 faces

Collect 50 faces

Collect 5 weapons

Collect 10 weapons

Collect 20 weapons

Finish a wave without touching a wall

Finish a wave without getting hit

Conquer the Starry Saloon without getting hit

Conquer the Western Wormhole without getting hit

Conquer the Glacier Galaxy without getting hit

Conquer the King Alien without getting hit

Finish the game without getting hit