Here is the full list of all 12 Train Bandit achievements.
Die 1000 times
Shoot 1000 bullets
Unlock Flap
Unlock every bandit
Kill 99 snakes
Unlock Doughnut
Unlock Box Cat
Kill three different sheriffs in a game
Kill 2000 enemies
Unlock E. Lawphant
Kill Poncho quickly
Unlock Bright Bandit