Here is the full list of all 12 Pac-Man Championship Edition DX+ achievements worth 200 gamerscore.
Finish Score Attack (5 Minutes) without using a bomb!
Play Score Attack (10 Minutes) until the very end!
Emit sparks for 1 second!
Play Score Attack (5 Minutes) until the very end!
Eat 30 ghosts in succession!
Beat the Time Trial mode!
Finish Score Attack (5 Minutes) with no mistakes!
Beat the game with every maze visual.
Score 500,000 points! (Score Attack 5 mins)
Score 1,000,000 points! (Score Attack 5 mins)
Score 1,500,000 points! (Score Attack 10 mins)
Score 2,000,000 points! (Score Attack 10 mins)