Here is the full list of all 22 Avalanche 2: Super Avalanche achievements.
Defeat both bosses in any double boss battle!
Beat the Great Wizard Ohe
Defeat every boss in the game
Get a max-level Speedster follower in Endless Mode
Complete 45 missions
Get a max-level Hopster follower in Endless Mode
Kill 50 Dragons
Fall in the laval 50 times
Use the climbing gloves 15 times
Fall in the lava 3 times
Bank a total of 1,000 coins
Beat Chicken Commander
Complete 15 missions
Beat Mama Squid and a Sky Rider
Beat any boss at the end of the clouds (600ft)
Beat Big Mouth and Queen Birdie
Beat any boss at the end of the cliffs (225ft)
Bank a total of 100 coins
Surf 22 falling blocks without touching the ground
Get a max-level Whirly follower in Endless Mode
That's impossible. There's no way his height is over 3000ft!
Bank a total of 10,000 coins