Here is the full list of all 18 Blue Sky Aces Demo achievements.
Awarded to players who complete their training
A pilot who has achieved 5 aerial victories
A pilot who achieved 10 aerial victories
A pilot who achieved 15 aerial victories
Awarded for your first aerial victory
Awarded for 50 aerial victories
Awarded for 100 aerial victories
Awarded for 500 aerial victories
Awarded for a long range aerial victory
Awarded for destroying 20 enemy balloons
Awarded for 5 aerial victories in a single mission
Destroy 3 enemy aircraft within a minute
Awarded for completing 10 missions
Awarded for completing 25 missions
Awarded for completing 75 missions
Awarded for completing 5 missions
Awarded for completing 50 missions
Awarded for completing 100 missions