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