Here is the full list of all 21 Brodefence achievements.
To die 5 time
To die 3 times
Use two air strikes in a row
Survive 20 minutes
Survive 15 minutes
Pick up 30 bonus
Explode on your own mine.
Kill the boss
Kill 500 enemies
Survive 10 minutes
Survive 6 minutes
Pick up 10 bonus
To die 1 time
Kill 200 enemies
Pick up 3 bonus
Survive 4 minutes
Play for all the characters
Kill 100 enemies
Survive 2 minutes
Kill 50 enemies
Kill 20 enemies