Upgrade a weapon
Complete a bonus objective
Take down a mini-boss
Fully upgrade a weapon
Complete the Industrial adventure
Go insane and survive
Kick an enemy to death
[Facility] Reach wave 10 on easy
[Facility] Reach wave 10 on normal
[Facility] Reach wave 10 on hard
Purchase a weapon from Dave
Complete the Haunted adventure
[Mansion] Reach wave 10 on easy
[Mansion] Reach wave 10 on normal
[Mansion] Reach wave 10 on hard
Complete all 3 bonus objective types
Buy all weapons and gadgets in Adventure Mode
Fully upgrade all weapons