A slew of game demos have hit Xbox LIVE Marketplace over the last few days, not least of which is a demo for X-Men Origins: Wolverine.

The demo for the action brawler, starring (nearly) everyone’s favourite X-Men (X-Man?), Wolverine, is now up on the service, allowing you to “unleash the adamantium claws and real-time regeneration of the world’s fiercest hero – Wolverine.” Hoo-Rah!

A demo for Sonic’s Ultimate Genesis Collection (known in other parts of the world as the SEGA Mega-Drive Ultimate Collection) is also up on Marketplace. The full game contains classic titles such as Sonic the Hedgehog 1, 2 and 3, Columns, Alien Storm, Ecco the Dolphin, Space Harrier and Streets of Rage 1, 2 and 3, but there’s no sign of what’s included in the demo. Guess you’ll have to find out for yourself.

The last demo recently made available is something called Up The Video Game, which takes players on an “exotic adventure with Carl Fredricksen and his young sidekick, Wilderness Explorer Russell, as they set off on a wild journey through the undiscovered jungles of South America.”

No other information is given on that one, so it can be left as a nice surprise for when you’re browsing the LIVE Marketplace.