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