Here is the full list of all 43 Up on the Rooftop achievements.
Who says playing with friends isn't fun?
Successfully deliver two presents to Grandma.
Shame on you.
Knock all civilians over in one Xmas.
Find Jingles the elf.
Unlock scanline mode
Unlock the Jingle Jukebox.
Unlock Scene Selection.
Unlock Infinity Mode.
Complete the First Noel.
Complete the Second Noel.
Complete the Third Noel.
Knock thrice on a door.
Santa is dead.
Encounter the bear in its natural habitat.
Have a bear kill all enemies in a stage.
Get 10 presents in one Christmas.
Get hit by every moving vehicle.
Unlock all secrets.
Listen to 5 songs in the Jingle Jukebox.
Listen to 10 songs in the Jingle Jukebox.
Listen to all the songs in the Jingle Jukebox.
Get 12000 points.
Get 24000 points.
Get 36000 points.
Defeat a Chill.
Defeat 12 Chills.
Defeat a Jack Frost.
Defeat 12 Jack Frosts.
Enter the Bunker and stay there for 30 seconds.
Ride the Ferris Wheel for one full rotation.
Destroy the package during the delivery.
Spike 12 enemies.
Spike an enemy.
Get no gifts throughout a single Christmas.
Survive a Boss with 2 players alive at the end.
Complete a stage in less than 30 seconds.
Game Over on the first stage.
Complete the Credits.
You got in the bag.
Have an elf mount a reindeer 3 times.
Knock out the lights in the department store.