Here is the full list of all 18 SQUAKE achievements.
Bring 100 dynamites to opponent's base.
Collect Turbo powerup 50 times.
Collect 1000 wagons.
Collect 200 wagons when using doubler powerup.
Collect 300 power-ups of any type.
Cut opponent train 50 times with a saw.
Kill 50 opponents while your train has 0 wagons.
Freeze 200 opponents
Kill 1000 opponents.
Kill 70 while you are frozen.
Kill 20 opponents by drivinginto them with Saw Power Up.
Win 50 times in any game mode.
Win 30 times in team towers game mode.
Have 666 wagons in your train at the same time.
Die 1000 times.
Cut yourself with saw powerup 15 times.
Collect 2000 things with magnet.
Crash into yourself 300 times.