RoosterTeeth has announced they will be developing a RWBY video game.
I'm guess it will be a hack-n-slash like 99 Knights or similar games.
cool.
So this came about because a fan made a sort of demo game based off RWBY in 5 months. He released it for free so others could enjoy it here: RWBY: Grim Eclipse.
I've been playing around with it a little bit and I'm enjoying it so far. It's kind of repetitive (due to the fact he stopped developing it after 5 months and hasn't worked on it since), but for only 5 months of work, it's pretty awesome. I feel he's really captured the spirit of Ruby's combat style.
The only fault I've seen with the game, is a lack of other options (i.e. more enemies, more characters, more items/gear etc). All things considered, it's pretty good. I have high hopes that the RWBY game will be pretty fun, though I don't expect it to be a title winner or anything.