Here is the full list of all 15 Air Brawl achievements.
Win 10000 Games
Win 1000 Games
Crash 1000 Times
Get 1000 Kills
Get killed by one of the developers
Win 100 games
Get 100 Kills
Win 10 games
Crash 100 Times
Complete the tutorial
Win your first game
Capture your first flag
Kill one of the developers
Crash for the first time!
Get your first kill