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