Here is the full list of all 28 Aplowcalypse achievements.
Score 0 points
Never use your boost during a single game
Discover a worm hole
Play all 3 game modes (Story, Score Attack, Survival)
Never use plowerups in a single game
Never use your secondary during a single game
Do you wanna kill a snowman?
Look at the credits
Listen to the full menu song
Play 42 Games (any mode)
Beat the Story
Beat the Story without losing a life
Beat the Story with 4 players
Score 1,000,000 points with 2 or more players
Hit 3 players with a single Knockback
Never kill another player during a 4 player game
Score 1,000,000 points
Get killed by your own fire tire
Score 500,000 points in a single bank
Steal 500,000 points from another player
Snipe a player with the High Beams from across the map
Win by 100,000 points in a 4 player game
Steal from all 3 other players in a single game
Kill 2 players with a single Gravity Mine
Play a 4 player game
Survive for 8:15 in Survival Mode
No hope for mankind
Thanks for "playing"