In The Red Solstice, you control one of the eight space marines that are trying to find out what happened to human colonies on Mars during the huge storm called The Red Solstice.
Pripyat reborn is a compilation of A.I. improvements, additions and bug fixes to the X-Ray engine. The goal is to improve the quality of the game that is S.T.A.L.K.E.R. Call of Pripyat.