Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

All Ghosts (10 points): Eat all ghosts in succession after eating a Power Pellet.
Clear Round 5 (15 points): Successfully complete the first five rounds.
Perfect (30 points): Eat all ghosts four times within a stage.
Clear Round 21 (40 points): Successfully complete round 21.
Cherry (5 points): Eat a Cherry in round 1.
Strawberry (5 points): Eat a Strawberry in round 2.
Orange (10 points): Eat a Orange in round 3 or 4.
Apple (10 points): Eat a Apple in round 5 or 6.
Melon (15 points): Eat a Melon in round 7 or 8.
Galboss (15 points): Eat a Galboss in round 9 or 10.
Bell (20 points): Eat a Bell in round 11 or 12.
Key (25 points): Eat a Key in round 13.