Here is the full list of all 61 Batla achievements.
In gib 500 times
40 hour in combats
Kill 4000 enemies
Do 510000 damage
Bring 500 candies
Back 500 candies on base
500 times "Double shot!!"
200 times "Triple monster!!!"
100 times "Hell yeah!!!!"
50 times "No mercy!!!!!"
Kill 500 enemies with candy
Use 500 grenades
Use 200 grenades
Pick up 2000 hit point box
Pick up 2000 armor box
Pick up 900 times
Pick up 190 times
Use jumper 2000 times
Headshot 500 times
Crit 10000 damage
Dodge 10000 damage
Get 10000 score on point
Kill 1000 enemies at point
Recharge point 35 minutes
Destroy 2000 mines
Do 55000 balloons damage
2500 kills on jumper
500 kills by fire
2500 kills by grenade
Do 55000 snowballs damage
Use 200 cocktails