Not a clue mate, seems to of completely vanished. Might be worth just checking again later.
Nope, can't even grab it from my download history, just gives an error message
It's a widespread glitch:
Just see OXM post about this issue aswell ....
Over a thousand games vanish from Xbox Live Marketplace thanks to "temporary" glitch
Goodness, XBLIG, have you lost weight?
It's back now btw....