Start a new game.
Finished the first secret, reversed level.
Finished the game.
Finished 100% of the game.
Found the first collectible.
Found all collectibles.
Finished the second secret, reversed level.
Finished the third secret, reversed levels.
Finished the game with 1 death.
Jumped out of the map.
Finished the 33rd level in less than 15 seconds.
Died 1000 times.
Named the character "Gaster".
Named the character "Salio".
Finished game in less than hour.