I found this game at Walmart for 10 DOLLARS! I only got it for SOTN, considering it's 10 dollars anyway and I like having hard copies of my games. But I installed the game and everytime I play it the disc spins, like there is no option to play it from the hard drive in the Game Library. Anyone know what I should do?

Well you did buy a, like you said "hard copy" so now you have to insert that "hard copy" whenever you wanna play it, if the box only included a redeemable code for the games then it would go to your hard drive as a "digital copy". If you install Mass Effect 2 to your hard drive u still have to put in the disc this is how Microsoft knows that you own the game and didn't rent it, install it and then just returned it.

Are you sure it's reading from the disc? It will still spin it initially to make sure you put the disc in, but after that you should only hear the fans. Do you hear the laser still moving around when the game is on a loading screen? That's the best sign to know that it is actually reading from the disc.

And I just checked Splinter Cell, the game I currently have installed - There is no "play from hard drive" option, but when i select "play game", it plays from the hard drive. I think they may have changed the "play from hard drive" option to simply "play game" in the last system update. I would assume this is because you can now also play games from USB drives, not just the hard drive. 

I will fool around with it some more and post back to see if it works.

Does anybody have a solution to this? I must not have been the only person to buy this game.