Here is the full list of all 31 Pummel Party achievements.
Complete 'Gift Grab' without collecting coal
Win 'Magma & Mages' without taking damage
Knockout 10 players in one game of 'Explosive Exchange'
As the lightning holder kill every other player in 'Thunderous Trench'
Get a double kill in 'Barn Brawl'
Survive for 50 seconds in 'Bullet Barrage'
Skewer three players with the rocket skewer item
Take no damage in 'Searing Spotlights' minigame
Find the treasure in 'Sandy Search'
Score over 5 in 'Bouncing Balls'
Knock off 5 players in one game of 'Snowy Spin'
Start your first game
Control over 50% of the area in 'Elemental Escalation'
Collect 40 keys in 'Winter Maze'
Survive in 'Breaking Blocks' for 60 seconds
Steal the last gift in a players pile in 'Grifting Gifts'
Got hit by the train in 'Temporal Trails'
Complete 'Slippery Sprint' without falling in the water
Win your first game
Died in 'Acidic Atoll' throwing a barrel
Survive for at least 50 seconds in 'Sorcerers Sprint'
Accidentally blew yourself up in the 'Strategic Shockwave' minigame
Get a 5 player kill sreak in 'Speedy Sabers'
Complete 'Rusty Racers' without falling off the track
Get your first goal
Hit three players with the remote control eggplant
Get launched off screen in 'Tunneling Tanks'
Win your first minigame
Place first in every minigame
Place last in every minigame