No missable achievements (plus 12 unknown)
Sign in with Steam or Xbox to track your progress, and:
Never make a correct move in a new game.
Use the shortcut in the Giddy Goons room.
Complete the game on any mode.
Lose your last life in the Drink Me scene... Watch Carefully!
Complete the game in Hard mode.
Complete the game on Arcade Mode
Get off on the elevator on the last floor.
Complete the game with the move guide turned off.
Play Dragon's Lair on its Anniversary: June 19
Dirk dies via asphyxiation in the bedroom scene.
Complete the game without dying.
Get the highest possible score (427,469).