GIBZ achievements

[Halloween] Smash 100 Pumpkins (unlocks the Pumpkin Head)

[Halloween] Eat 200 pieces of candy (unlocks the Witch Hat and Nose)

[Base Defence] Have a Boss reach 0 health without a single player damaging them

[Xmas] Get a Snowman Head

Beat the final boss having never lowered the difficulty below HARD or spent any money on that character (unlocks Dark Knight Helmet)

[Xmas] Find and collect the Antlers off the "Deerwolf" (unlocks Antlers)

[Base Defence] Clear 100 Waves

[Halloween] Go Trick-or-Treating wearing a Halloween themed item

Die a lot (unlocks the Tall Top Hat)

Give the Machete Slinger a taste of his own medicine (unlocks the Bloody Metal Mask)

Hit a stick of dynamite 7 times back and forth with a friend

Hit back 262 projectiles (unlocks Baseball Bat)