The game received two standalone expansions (prequel and sequel to the events presented in the original game) - Clear Sky and Crypt Depot - and together they sold more than 4 million copies. The combination of an interesting story with excellent, although very challenging gameplay brought financial success to the developers of the original.
2: Heart of Chernobyl is an FPS, immersive sim and survival horror game, and at the same time the fully fledged second installment of the series initiated in 2007 by S.T.A.L.K.E.R.: Shadow of Chernobyl.
