Assassin's Creed II is the next game available as a free download for consumers with Xbox Live Gold subscriptions. Simply boot up your Xbox 360 console and download the game from the Marketplace. As a title that's usually priced at $19.99, this is an absolute bargain, especially if you've played the first game and have not yet looked at continuing the experience.
The second instalment has taken numerous awards, as well as a high rating of 90 at Metacritic. Sporting open world gameplay, Assassin's Creed II will surely zap some free time off your hands.