Here is the full list of all 12 Death Tank achievements worth 200 gamerscore.
Rack up 5000 on the Total Kills leaderboard.
Attain the rank of Tank Commander.
Rack up 250 on the Total Kills leaderboard.
Rack up 50 on the Total Kills leaderboard.
Kill 2 enemy tanks with one nuke. "A nuke on the battlefield is worth two in the store."
One shot an enemy tank using a straight up MIRV.
Hit an enemy with 3 missiles in a row. Each missile must spend at least 2 seconds in the air.
Eliminate your killer with your last dying shot and get REVENGE!
Kill an enemy while flying upside down.
Shoot an enemy using full power.
Fly half the width of the screen and stick the landing... In under 5 seconds.
Hit and kill an enemy with 3 shells in a row. Each shell must be airborne for at least 1 second.