Complete the "Endurance" campaign mission
Reach wave 7 in horde mode
Complete the "Forward" campaign mission
Win your first five matches
Unlock the highest level
Lose your first three matches
Complete the campaign
Kill 1.000 abstractanks with a single bombardment
Complete the "Trap" campaign mission neither using the bombardment power-up nor suffering any losses
Kill 1.000.000 abstractanks
Save 1.000 abstractanks from bombardments using the phase power-up
Reach wave 15 in horde mode
Complete 10 campaign challenges
Complete all campaign challenges
Fully upgrade an abstractank