Some perks only become available once you unlock them by completing Campaign worlds:
| Completed World | Unlocked Perks |
|---|---|
| 1 | Ice Shots and Death Ice |
| 2 | Death Poison and Death Fire |
| 3 | Hoarder and Tiny |
| 4 | Zap and Death Zap |
| 5 | Haggler and Treasure Hunter |
| 6 | Balloon and Hit Mark |
| 7 | Power Tripper and Tank |
| 8 | Sustained Fire and Crafter |
| 9 | Croesus and Improved Ice Shots |
| 10 | Improved Zap Shots and Super Magnetism |
| 11 | Improved Power Tripper and Improved Sustained Fire |
| 12 | Need for Speed |
| 13 | Aerial Protection |
Note:
These perks can be available in special events (Regular Endless, Endless Boss for sure, maybe also Endless Waves, Dark Castle and Guild runs) even if you haven’t unlocked them.