I think this is an easter special, saw it in a newspaper today. It is available online and offline.
" Taking full advantage of the Xbox 360s unprecedented power, Lost Planet will contain an unrivalled level of detail as advanced light sourcing is used to ensure a realistic presentation. Enormous world maps unfold as players battle the menacing invaders during blistering weather conditions throughout vast snow fields and deserted cities. Fostering a real-time loading system, players can expect a seamless experience that leaves them completely immersed. Multiplayer modes add to the value of Lost Planet by allowing players to partake in intense team battles via the Xbox Live® online game service.
* Xbox Live enabled Experience an array of gameplay possibilities with online cooperative battles.
* Vehicle based gameplay Jump in and out of a variety of heavily armed vehicles not only to help them traverse the treacherous terrain, but eliminate the terrifying enemies that threaten their survival.
* Vast arctic environments - Snowstorms, arctic winds, towering mountains of ice are all stunningly realized, creating a truly immersive and cinematic event of epic proportions.
* A premier team of developers The creators of the Onimusha and Devil May Cry series have come together to create the expansive world of Lost Planet."