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