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