Here is the full list of all 32 SOUTH PARK: SNOW DAY! achievements.
Defeat Kyle in his sacred grove.
Kill an Ent with Bleeding damage.
Heal 150 points of damage with a single Healing Totem across any number of allies.
Make at least 4 enemies Vomit with no more than 1 second in between each.
Kill an enemy with an aerial attack after floating with Moon Jump for at least a second.
While Invisible, defeat a human boss with a melee attack.
Dance while reviving an ally.
Start a run with someone who has Socially Transmitted Distraction. They say it started in a lab out in California somewhere.
Defeat 10 Vampire Kids.
Defeat Stan within 25 minutes of starting your run.
Defeat Cartman without damaging any stationary decoy.
Kill 50 Pooplets in one battle.
Kill 3 enemies with cannonballs.
Fart on 3 Assassins using Fart Escape.
Revive an ally with a Cheesed Necro.
Relieve the buildup of natural pressures in the gastrointestinal tract through quick, albeit semi-musical, bursts of gaseous release.
Toot on an enemy faction leader while dead.
Defeat Liane at the church.
Become an honorary Marshwalker.
Defeat Stan at the playground.
Defeat Princess Kenny at the Town Square Ampitheater.
Defeat Cartman in the foothills.
Defeat Mr. Hankey.
Finish a map with one extra Rulebook applied.
Find and activate every Rulebook across an entire run, and live to tell the tale.
Increase the rarity of 10 upgrades to Rare or better.
Acquire a Legendary Upgrade.
Acquire an Ultra-Legendary Upgrade.
Use Cheesy Zombies on a Necro.
Damage an enemy in your Event Horizon using your own projectile.
Defeat 10 enemies with weapon strikes from the air.
Set 4 or more enemies on fire with no more than 2 seconds in between each.