Here is the full list of all 13 Pixel Beef Battle achievements.
You paralyzed 500 enemies
You smashed 200 enemies
You died 100 times
You survived 5 matches
Wow you survived 1 match!
You survived 15 matches
You smashed 10 shiny enemies
You used 10 power up's
You smashed 100 enemies
You used 50 power up's
You smashed 500 enemies
You smashed 1000 enemies
you smashed 2000 enemies