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