From Brotato Wiki
XP Gain
"XP Gain" is a hidden tag for certain Items. It's applied to items related to gaining XP (to level up faster and acquire more Upgrades).
The Character 
Mutant has a higher chance to find these items in the Shop.
Items tagged with "XP Gain"
| Name | Rarity | Effects | Base Price | Limit | Unlocked By |
|---|---|---|---|---|---|
| Tier 3 | +50 % XP Gain -2 % Life Steal |
70 | |||
| Tier 2 | +25 % XP Gain +3 Melee Damage +3 Knockback -8 Luck |
50 | |||
| Tier 4 | +10 Engineering +50 % XP Gain -3 Max HP |
90 | |||
| Tier 1 | +20 % XP Gain -8 Range |
25 |
