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