Levels

Recipe Unlocks

 * Level 1
 * Level 5
 * Level 10
 * Level 15
 * Level 20
 * Level 25
 * Level 30
 * Level 35
 * Level 40

Other Notable Levels

 * Level 100
 * Level 200

Formula
The total xp required to get to a level can be calculated with the formula ceil(2 * (L - 2)2.75 + 20) * 3, where L is the target level like 10 or 25.