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