Beat the fourth boss.

Beat the first boss without dying.

Wield the knife in single player or co-op mode.

Choose a costume for your sackperson with at least one item on your head, at least one item on your body, and a material

Complete A Mission Without Dying

Fully Upgrade A Single Stat Of Any Weapon In Campaign Mode

Be among the first 10 people to complete a community level

Complete a level with more than one player

Travel to an incredible height

Collect 1,000,000 points over all levels you have played

Get an 8X Multiplier

Place a sticker