Here is the full list of all 17 Of Tanks and Demons III achievements worth 1,000 gamerscore.
Beated the final boss
Completed twelve levels
Completed ten levels
Used boost 60 times
Killed 72 monsters
Beated the second boss
Completed five levels
Beated the first boss
Collected 150 photons
Purchased all upgrades for one tank
Purchased a HELL BUSTER
Purchased a THUNDER
Purchased a RED SHADOW
Yeah! Rock!
Collected 100 photons
Collected 50 photons
Purchased your first upgrade