Here is the full list of all 29 Shooty Skies achievements.
Complete 5 Daily Missions
Defeat 7 different bosses in Classic Shooty on Screamy Intensity
Defeat 200 Arcade Machines
Score 250 points in one game of Classic Shooty on Screamy Intensity
Collect 5 Secret Unlock Pilots
Clear level 1 in Classic Shooty on Scouty or Skirmish Intensity
Score 100 points in one game of Classic Shooty on Scouty or Skirmish Intensity
Collect 5 Gold Pilots
Collect 10 Golden Tickets
Defeat 3 sparkly rare enemies
Collect 500 coins
Collect 10 Pilots
Fly with 3 different sidekicks in a Classic Shooty game
Defeat 500 enemies
Defeat 5 different bosses in Classic Shooty
Clear level 1 in Classic Shooty on Shooty or Screamy Intensity
Score 100 points in one game of Classic Shooty on Shooty Intensity
Get a ball bounce score of 10 in Classic Shooty
Collect 100 Rings in Daily Missions
Clear all Daily Missions in a Calendar Month once
Complete all daily mission objective types
Unlock Drama Llama
Collect 100 Kittens in Daily Missions
Spend 10 minutes escorting in Daily Missions
Play 7 consecutive days
Use 3 different boosts from the upgrade system
Score 1750 points in one game of Classic Shooty on Shooty or Screamy Intensity
Get a ball bounce score of 12 in Classic Shooty on Screamy Intensity
Spend 5 minutes escorting in Daily Missions on Screamy Intensity