Tron: Evolution

Honestly you should pass 20 in campaign playthrough. I only played multi-player enough to earn a couple of levels and finished the game at level 27. Otherwise you can grind chapter 6 w/ the tank and earn a TON of XP if you need.

Just reach the Version 20 (Level 20) of your character, once you start the game all your experience, mods and collectibles are carried through multiple playthroughs.
I strongly recommend to start the game on Hard difficulty to unlock Insane mode, once you beat the game you will reach Version 20 or further.