Ooh. OK, now I'm interested. Tribes rocked.
Then you don't want Brink, you want Section 8: Prejudice.
Well, it turns out that S8 isn't all that much like Tribes. Yeah, it's got tactical combat with variable-loadout powered armor on wide-open maps, but the maps aren't as wide open as Tribes, vertical mobility (via jetpacks) isn't nearly as well integrated, and there are no flying vehicles at all. It has a couple of good points: anybody can spawn deployables without devoting precious inventory space to it, and it's easier to change loadouts on the fly. Overall, though, the gameplay isn't nearly as polished or streamlined as Tribes (or even Tribes 2, which IMO was a step down from its predecessor).
Overall, I call it Unreal Tournament with gimmicky jetpacks, rather than a worthy successor to Starsiege: Tribes. Disappointing.