Unlock extra Custom Class slots.
| Unlockable | How to Unlock |
|---|---|
| Custom Class slot 06 | Enter 01st Prestige |
| Custom Class slot 07 | Enter 03rd Prestige |
| Custom Class slot 08 | Enter 05th Prestige |
| Custom Class slot 09 | Enter 07th Prestige |
| Custom Class slot 10 | Enter 09th Prestige |