You can buy NBA 2K14 on Gamersgate and then simply extract zip file and launch/login steam and add the serial of gamersgate (after purchase) to activate the game in steam and or if you already own the game then use that one and install the game and play! 512MB GFX card i highly recommended on this one. Latest NBA basketball game! Works great on my AMD Radeon 6770M Mac although OSX 10.8.3+ is required for the latest AMD Radeon graphics drivers! Nvidia Card not tested yet, but most likely will work fine as well as it did in earlier versions of the game.