Here is the full list of all 50 Sonic & All-Stars Racing Transformed achievements worth 1,000 gamerscore.
Triple-Stunted while transforming into a car or boat
Absorbed a weapon with the Glove and fired it back at your attacker
Beat 01:11.16 in Time Attack as Vyse in Rogue's Landing
Did a Boost-Start in each vehicle mode
Evaded or Blocked a homing-weapon 3 times in a Race
Hit 1st, 2nd and 3rd place with a Swarm attack
Detonated the Hot Rod at the very last second
Rolled Left, Rolled Right, Backflipped, Forward Flipped and landed as a car or boat
Completed an event with 4 local friends
Scored 90% accuracy with aimed weapons in an event
Won a Matchmaking game
Manually selected a Random character for a Matchmaking game
Earned your B Class License
Did a Reckless Boost
Finished 1st in a Grand Prix tournament
Beat your first Staff Ghost in Time Attack
Hit an opponent with a weapon while looking backwards
Finished 1st in a Race without getting hit by weapons
Did 5 overtakes in a single Drift
Got 10 hits by firing weapons backwards in a single event
Did a Level 3 Air-Drift
Won an event with a Mod equipped
Collected 10 Stars in World Tour
Got a total of 20 hits with weapons in a Race
Turned All-Star
Finished 1st, 2nd, 3rd and 4th with local friends in a 10 player Race
Levelled-up a character
Finished 0.5 seconds ahead of an opponent in a Race
Did a 10 second Drift as Sonic
Hit 2 opponents with a single Hot Rod Blast
Visit every location in the game
Earn your A Class License
Earn your S Class License
Earn your Star License
Earn your Triple-Star License
Complete a World Tour event on Expert difficulty
Beat all the Staff Ghosts in Time Attack
Unlock Superstar Showdown in World Tour
Unlock every Character in the game
Get a Podium Finish in every Grand Prix tournament
Unlock Mirror Grand Prix mode
Get a Podium Finish in every Grand Prix tournament on Expert difficulty
Complete the Dream Valley Ring Race and pass every Ring as NiGHTS or Reala
Collect every Star in World Tour
Get a Perfect Drift score on a Drift Challenge event
Finish a Battle Race without losing any lives
Freeze an opponent with Ice from at least 100 meters away
Finish 1st in every Grand Prix tournament on Expert difficulty
Do 10 Stunt Combos in a single event
Finish 1st in a Grand Prix tournament at Expert difficulty