Here is the full list of all 18 Tank Battle: 1944 achievements.
Destroy first Tiger Tank in a game versus the AI
Destroy 10 Tiger Tanks in games versus the AI
Destroy 10 Panzer Tanks in games versus the AI
Destroy 3 enemy units without losing any of your own in games versus the AI
Destroy 8 enemy units without losing any of your own in games versus the AI
Destroy 12 enemy units without losing any of your own in games versus the AI
Complete US Campaign
Complete German Campaign
Complete Rising Storm Campaign
Complete 10 scenarios on Hard difficulty
Complete 30 scenarios on Hard difficulty
Destroy 1 Panzer Tank in games versus the AI
Complete Tutorial Campaign
Complete Bastogne Campaign
Complete Northern Front Campaign
Complete Iron Cross Campaign
Complete Bombardment Campaign
Complete Juggernaut Campaign