Here is the full list of all 25 PAC-MAN™ and the Ghostly Adventures achievements.
Collect at least one Arcade Token in every level.
Defeat 100 enemies as Metal Pac.
Defeat 100 enemies as Granite Ball Pac.
Increase Pac's maximum Health to 6.
Defeat 100 enemies as Chameleon Pac.
Complete all levels of the Pineapple Tank arcade mini-game.
Complete the final level of the game.
Complete all levels of the Pacerchini arcade mini-game.
Complete all bonus levels.
Unlock Chapter 6.
Defeat 300 Blue (Scared) Ghosts.
Complete all levels of the Lemon Rocket arcade mini-game.
Unlock Chapter 5.
Defeat 100 enemies as Fire Pac.
Collect enough Globe Energy orbs to unlock the Temple of Mystery.
Unlock Chapter 4.
Increase Pac's total lives to 50 or more.
Complete all levels of the Cherry Copter arcade mini-game.
Collect enough Globe Energy orbs to unlock the Temple of Ice.
Defeat 100 enemies as Ice Pac.
Unlock Chapter 3.
Collect enough Globe Energy orbs to unlock the Temple of Slime.
Unlock Chapter 2.
Chomp 50 recycling bins over the course of the game.
Complete an entire level without losing a life.