Here is the full list of all 27 Dustoff Heli Rescue 2 achievements.
Promotion for 20 stars.
Promotion for 10 stars.
Complete a mission with depleted ammunition.
Complete training
Watch the credits.
Land on all Landing Zones.
Transport 200 soldiers.
Destroy 500 enemies.
Own all the helicopters.
Get all of the weapons.
Promotion for 30 stars.
Promotion for 40 stars.
Promotion for 50 stars.
Promotion for 60 stars.
Promotion for 70 stars.
Promotion for 80 stars.
Promotion for 90 stars. Orders General?
Promotion for 105 stars.
Defeat the boss on level 35.
Collect 175 dog tags.
Crash your helicopter during training.
Complete an attack mission with a transport helicopter.
Find the artifact in the desert.
Find the Ferris Wheel in the taiga.
Complete Mission #30 without retrying from landing zone.
Land on the drop zone with one man left behind.
Find the Swords in the fjords.