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