Here is the full list of all 21 bomber-un achievements.
First launched the game
1 hour in the game
Completed 1st level
Completed 2st level
Completed 3st level
Completed 4st level
Completed 5st level
Completed 6st level
Completed 7st level
Completed 8st level
Completed 9st level
Completed 10st level
Completed 11st level
Completed 12st level
Completed 13st level
Completed 14st level
Completed 15st level
Completed 16st level
Completed 17st level
Completed 18st level
You need to win 25 times