Here is the full list of all 10 Air Forte achievements.
Complete a practice session at the highest difficulty.
Collect 227 bubbles.
Complete the Adventure
Complete Challenge under 60 seconds.
Complete Infinite level 5.
Collect 1000 bubbles.
Complete Infinite level 10.
Complete Challenge with two or more players.
Complete any level with four players.
Reach Infinite level 4 with four players.