Here is the full list of all 25 Bean Battles achievements.
Unlock by reaching level 50
Unlock by winning 10 games
Unlock by winning a match on Campout
Unlock by reaching level 25
Unlock by getting 100 kills
Unlock by having a negative KD in a match
Unlock by getting 20 kills in a match
Unlock by getting a kill using a vehicle
Unlock by reaching level 10
Unlock by winning a match on Shipment
Unlock by reaching level 5
Unlock by winning a solo game
Unlock by getting 10 kills in a match
Unlock by getting first kill
Unlock by reaching level 1
Unlock by launching bean battles
Unlock by reaching level 100
Unlock by winning a team game
Unlock by having negative total score in a match
Unlock by getting 30 kills in a match
Unlock by winning a game with custom weapons
Unlock by winning 50 games
Unlock by winning 100 games
Unlock by getting 1000 kills
Unlock by getting 10000 kills