Game over for the first time.
Send a message from the game via a social networking site.
Change your helmet for the first time.
Write a review.
Climb 10 floors.
Climb 60 floors.
Climb 30 floors.
Climb 90 floors.
Reach the top floor and save the princess.
Acquire all of the helmets.
Do multiplayer for the first time.
Win in multiplayer for the first time.
Win 10 times in multiplayer.
Win 100 times in multiplayer.
Win 50 times in multiplayer.