Perform the following to unlock the challenges.
| Challenge | How to unlock
|
|---|
| Attrition | Obtain Arena Token in Level 2: Mess Hall Mashup.
|
| Big Hits | Obtain Arena Token in Level 4: Undertown and Beyond.
|
| Magnet | Obtain Arena Token in Level 1: Stow Away.
|
| Malfunction | Obtain Arena Token in Level 5: Core of the Problem.
|
| No Time for Heath | Obtain Arena Token in Level 3: Welcome to Erf.
|
| Sale on Turrets | Obtain Arena Token in Level 6: No Time for Sightseeing.
|
