Here is the full list of all 21 Lunch A Palooza achievements.
Get killed by environment effects
Be first kill in the match
Get 1st kill in the match
Win without dying once
Get a Triple Kill
Flung off the map into the air
Die while table is flipping in Pixel Pizza Paradise
Stayed on hill longer than 10 seconds
Playing 3 v 1
Win a match in under 30 seconds
Win 30 matches
Unlocked Pizza Character
Unlocked Ice Cream Character
Unlocked Donut Character
Unlocked Sushi Character
For unlocking everything, we salute you!
Get killed by the UFO
Get killed by the Wood Fried Oven
Get a coin in the Arcade Machine
Get to the top of the Chandelier
Get to the Island of Dolls