Here is the full list of all 20 Joe Danger achievements.
Get a level Combo Star
Get a Time Star
Find 3 Hidden Stars
Get 5 Coin Dash stars
Get 5 Target Stars
Collect all Pickups on 8 levels
Send 1 level to a friend
Receive 1 level from a friend
Get 15 Time Stars
Get 30 Combo Stars
Get a x40 combo
Get 4 stars in one run
Complete the first two levels
Play until the credits roll!
So dangerous they named him twice! Collect all stars in career mode.
Conquer the first challenges in the lab to become the Maestro of Madness!
Crash through the second lab tour to become the Commander of Catastrophe!
Duck and dive through the third lab tour to become the Duke of Destruction!
Conclude the fourth lab tour to be crowned the King of Chaos!
Attain the ultimate title of Master of Disaster!