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