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