Die/Reset for the first time
Finish a Main Line Level (Singleplayer)
Finish an Experimental Level (Singleplayer)
Finish a Classic Level (Singleplayer)
Finish the Tutorial
Beat your personal time (any map, Singleplayer)
Beat the Dev time (any map, Singleplayer)
Host a Multiplayer Lobby
Reach 2000 MPH
Find a secret hidden in a classic level