Here is the full list of all 20 StuntMANIA Reloaded achievements.
Perform 50 x hangtimes
Perform 10 x hangtimes
Collect all the power ups in any level
Collect 500 green batteries
Collect 500 yellow Batteries
Collect 500 red batteries
Blow up your car 50 times
Blow up your car 250 times
Blow up your car 500 times
Perform 10 x 1440 degree forward/backward flips
Perform 50 x 1440 degree forward/backward flips
Perform 100 x 1440 degree forward/backward flips
Perform 100 x hangtimes
Perform 250 x hangtimes
Perform 10 x 1440 degree flat spins
Perform 50 x 1440 degree flat spins
Perform 100 x 1440 degree flat spins
Perform 10 x 1440 degree twists
Perform 50 x 1440 degree twists
Perform 100 x 1440 degree twists