About BRINK...

“Our challenges are entire scripted levels, which you can play solo or co-op. An example of one is a level we call “MEDIC!”, where you play as a medic on a team, where your only job is to keep the other team-members alive, while they complete core objectives. The trick to doing well in this challenge is being smart about who you revive, and when you revive them. If you win, you’ll unlock something cool, as well as a tougher difficulty level. And if you beat that difficulty level, you’ll unlock more cool stuff and difficulty levels.

And once you’ve truly mastered all the challenges (which are fun mini-games in their own right), you’ll have unlocked tons of great stuff, and you’ll have learned a lot of the skills you need to do well online.”

Each challenge has 3 levels - the 1st one is easy, the 2nd one is a bit more difficult, and the 3rd one "Is a ****in' bitch to complete" (Rahdo's exact words) The 3rd level is designed to be hard for the developers themselves, but after you complete level 3 then there is a leaderboard to try to work your way up as well.