I was curios to see what other games Ukrainian Developer 4A games, currently developing Metro 2033, had made. None, so this is their first title, does not sound reassuring. But wait a minute, it isn't actually their first game! Wikipedia claims that these were the guys who developed the X-ray engine, use for the S.T.A.L.K.E.R. series. So comparisons to the S.T.A.L.K.E.R. seem to be justified.

Here's the entirety of the Wikipedia article :D

"The company was formed in Kiev, Ukraine It was founded by people who split off from GSC Game World a year before the * release of S.T.A.L.K.E.R.: Shadow of Chernobyl, in particular Oles' Shiskovtsov and Aleksandr Maksimchuk, the programmers who worked on the development of X-Ray engine used in the S.T.A.L.K.E.R. series."

*It actually had a second the here, I deleted it from Wikipedia though, aren’t I helpful.