S.T.A.L.K.E.R: Shadow of Chernobyl was released March 20, 2007 by Ukrainian studio GSC Game World. The project was very warmly received by the players of the CIS countries and became a cult title.
However, few people know that Shadow of Chernobyl was planned to be released on Xbox 360. Not only that, when the game was called Stalker: Oblivion Lost, they also wanted to release it on Xbox Original, but the idea was postponed.
After the long-awaited release and the start of development of Clear Sky, GSC announced that Shadow of Chernobyl would be released on Xbox 360. However, this idea was discarded after the release of Call of Pripyat.
Quite recently some build of Shadow of Chernobyl was leaked on the Internet. In many ways it was the same game, but with one “but”: it had an inventory wheel, stylized for a gamepad, and in the tutorial instead of the keyboard keys, as it was in the PC version, there were console keys (and from the Xbox!).
Whether this was the exact build that was talked about back in 2007, or whether it was a relatively recent version meant to be re-released on modern consoles is unknown. Well, time will tell.