Ah, they hid the ones for story progression. That's good.
I particularly like these:
15 - Bronze - Hooray for our side
Won an online Team Disintegration match in the Game Grid.
15 - Bronze - We made it!... this far
Drove a total of 15,000 Kilocycles with your Light cycle or Light tank
From what I can piece together so far, it seems like the entire game is based on three open worlds, Tron City and two others that were previously announced. You go to the Game Grid section of the Tron City world to enter multiplayer matches, and all the other parts of the three worlds are where singleplayer missions will take place.
That sounds awesome.