It's out!
You start off in a tutorial mode as the assault class type; the controls are good and very responsive. It's pretty easy to pick up and play.
Played one team vs. team match; the game takes a different approach than other shooters as your goal is to defend your base (and the ball within) by building turrets and spawning robots to help you. Everyone no matter what class is able to do this, and the more robots you have, the more pressure is put on the other team before they finally go under. It's very easy to build/spawn stuff-- you just go up to marked locations and hit down on the d-pad to spawn robots or choose which type of turret to build. Everything costs money, so you have to manage you own ability leveling (done at any time by hitting up on the d-pad) with defending your base. Like the playable characters, there are different types of robots, from smaller bots that can cloak to huge, hulking mechs that take a lot of firepower to go down.
I decided to try the assassin class in-game and got owned pretty badly. She's a total ninja and can sprint, cloak, and use smoke bombs, but she's weak as hell in both offense and defense. Even when I'd sneak up on someone and go for a stealth kill, half the time they'd throw me off of them or it wouldn't be enough damage to destroy them.