"Existing Xbox Live Gold members will begin receiving two free games per month, Microsoft just said on stage at E3. The offer is plainly an answer to the robust free game offerings PlayStation Plus has introduced."
"...Xbox Live Gold is being upgraded to a PlayStation Plus-style model, with two free games per month through the release of the One. First up: Halo 3 and Assassin's Creed 2. New and current XBL Gold members will get the games for free, to keep, starting July 1. "
Source: http://kotaku.com/existing-xbox-live...g-tw-512305727
Source: http://www.joystiq.com/2013/06/10/ne...ailable-today/
Update:
"As our way of saying thanks for being part of this community, we’re giving all qualifying Gold members two free Xbox 360 games each month for the rest of the year. Each specially selected, fan-favorite game will be available to download only for a limited time, so grab them before they’re gone and keep them no matter what. Tell a friend about this offer so they can go Gold and get free games too."
Source: http://www.xbox.com/en-US/live/game-with-gold