"For this weekend you can get 30% off Defiance and the Defiance Season Pass by using the voucher code GMG30-LLAKQ-WPPQZ. Voucher runs out at 1700UTC 15/04/2013. "
Dunno if this is due in part to the rocky launch or whatever, it was only 25% off during the pre-order and 20% off once it went live, so 30% off seems like a pretty good deal.
Still on the fence as to whether or not I'm actually going to bite on this tho.
Update: Game is now even cheaper, $33.60 w/ code GMG20-GGN5D-FC3NA