I've searched quite a bit and surprisingly found no sign of a Defiance megathread, so I decided to make one.
Defiance is an MMO shooter being developed by Trion Worlds, the same guys who brought us RIFT. A TV show of the same name will also launch at the same time the game launches and the events of the show will affect the game, and vice versa. It's an interesting and unique concept.
The game is a third person shooter within an open world. A lot more information can be found here: http://defiance.com/en/game/overview...CAS_REDIR=true.