Found this one in my Gears of War Judgment game boxes but don't know if it still works. Original Xbox 360 Gears of War full game download, backwards compatible with Xbox One:
86V6R-V9GTT-YG3FQ-K83HX-BRVYV
Mine was received Wed. but no payment yet. Monday is Labor Day so I don't think there'll be any payments on that day but I'll be happy to be proven wrong.
Sent a game to them and everything worked. The transaction went through a week after I sent it.
Without tracking, I just crossed my fingers and hoped they got it, which they did.
I'll vouch for Alan Wake as well. I absolutely loved it, and the TV episode format the game uses is different from every other game out there. Creepy atmosphere and great (and creepy) characters all around. Make sure to watch the free prequel web videos on Zune Marketplace as well.
Cheapest price I've seen yet for this game. I wondered if it was the old version, but I checked again and it says its the new 2012 version. Oddly enough, the old version is $48 while the 2012 version is $34.99. Here's the link...