Bungie Studios’ Halo 3 is the latest game that is offered through the Games with Gold program for Xbox Live Gold members.
Since June, Microsoft has been giving away two games a month through its Games with Gold initiative. The deal is similar to what Sony has been offering with PlayStation Plus, and makes two games available for free on a monthly basis to Xbox Live Gold members.
Downloaded games will remain in the user’s library even after they unsubscribe from Xbox Live. The only caveat is that the game will be available to download for a certain time. For Halo 3, that is from October 16 – October 31. The other game available for download through the first half of the month is Might & Magic: Clash of Heroes. Both games normally retail for $14.99, so make sure you download the games before time runs out.
Source: Xbox Wire