Most of you probably already know that the demo of Spider-Man: Friend or Foe is up for grabs on Xbox Live Marketplace. However, what many of you might not know is that the demo has a goodie hidden in it. To be precise, a sidekick cheat code which we're guessing you'll be able to keep for the full version... or not. The important thing is that Spider-Man: Friend or Foe, the demo, is ready to be downloaded and played.

And if you don't want to take our word for it, you don't have to. As such, here's an excerpt from the official report: "The Spider-Man: Friend or Foe Xbox 360 demo is now available for download on Xbox Live Marketplace. Gamers can play as Spider-Man and villains-turned-allies Green Goblin or Venom in the Tokyo Rooftops level, as well as a boss battle with Doc Ock in the Tokyo Secret Labs level. Players will be rewarded with an unlockable sidekick cheat code for the game."

And there's more. With Spider-Man: Friend or Foe, you'll be able to gather some 1000 achievement points, via 12 in-game achievements. OK, no for some stuff on the full game:

Spider-Man: Friend or Foe challenges players to defeat and then join forces with notorious movie nemeses including Doc Ock, Green Goblin, Venom and Sandman, and other classic Spider-Man characters. Players will embark on a global quest to overcome an evil threat, by controlling Spider-Man and one of numerous Super Hero or Super Villain sidekicks, as they master unique fighting moves and styles while switching between characters to execute team combos and defeat foes, reads the game's official description.

It has also been confirmed that Spider-Man: Friend or Foe features a great co-op mode in which a friend can join the game at any given time and become Spidey's sidekick. The two can then battle through the game side-by-side and replay favorite levels.

What are you waiting for?! Go check out Xbox Live Marketplace right away - there's a great demo to be downloaded, played, cheat-code-extracted and used for getting 1000 points. Not bad for a free download, huh?