Survive a wave of enemies
Survive ten waves in a row
Survive twenty-five waves in a row
Survive fifty waves in a row
Open a box
Open ten boxes
Open twenty-five boxex
Buy a mod
Buy five mods
Buy ten mods
Got more than 50% extra xp using mods
Get at least one weapon of each type
Win any horde stage
Win two horde stages
Win all horde maps
Make over 50.000 points in any horde stage
Equip three skills
Get more than 10.000 gold in horde mode
Complete the first challenge
Complete the second challenge
Complete the third challenge
Complete the fourth challenge
Complete the fifth challenge