The Stalker games are very good and bring you into the game. They have survival horror features and have even startled/scared me at points. They are first person shooters. They have rpg like elements and a large open area to play in.
Its like Fallout and Metro. What you mostly do in the game is complete missions and explore the area (Chernobyl,and other various locals). Its a wicked fun game in my opinion and I though i would share!