Dead Island will be the first of the two released for free. Beginning tomorrow, February 1, the open-world zombie game will drop from its usual price of $19.99 for two weeks. While it had technical issues, it was well received upon its release in 2011. The game went on to be a major success, having sold 5 million copies as of early last year. Those strong sales led to a sequel, Dead Island: Riptide, being released last April.
As always with the Games With Gold promotion, these games are available only to Xbox Live Gold members. They are free to keep and re-download the games forever -- even if their subscription lapses -- but a download of them must be initiated during the two-week span that they are free.
Both of these games, as with all of the games since the promotion started, are for Xbox 360, but we know there are plans to begin including Xbox One games sometime this year.