Kill 100 aliens
Kill 1000 aliens
Kill 5000 aliens
Kill 10000 aliens
Collect 50 scraps
Collect 200 scraps
Collect 1000 scraps
Collect 2500 scraps
Get 4 Challenge medals
Get 8 Challenge medals
Get 16 Challenge medals
Get 32 Challenge medals
Complete the tutorial
Defeat the final boss
Complete the desert biome
Open 10 spawn crates
Open 50 spawn crates
Open 100 spawn crates
Have a single turret kill 30 aliens in a level
Get all the Challenge medals
Complete all 4 challenges on a level
Complete a level with 4 players
Complete a level with a friend
Complete a level on your own
Chuck a stunned alien into a bottomless pit
Put on a hat
Fall down bottomless pits 20 times
Be disassembled by an alien 100 times
Find all the duckies
Complete all levels with hardcore mode enabled
Scrap the crown of the Slime King
Clean out the competition
Construct a giant garbage cube