Here is the full list of all 14 Dustoff Heli Rescue achievements.
Die within the first 4 seconds.
Earn golden medal on every mission
Earn at least silver medal on every mission
Complete the last mission with the M60 gun
Complete every mission
Save Rambo
Save 200 soldiers
Save 100 soldiers
Save 50 soldiers
Find Buddha
Pick up 20 soldiers without landing
Survive hitting a tree
Spin with the Scout twice at the same time
Spin with a full Scout