WHat a bargain. You can get whole STALKER (or S.T.A.L.K.E.R. for those with full stop addiction) trilogy for a meagre £5.24 on Bundle Stars, including STALKER: Clear Sky, STALKER: Shadow Of Chernobyl and STALKER: Call Of Pripyat. Though I still rate the original above its prequel and sequel, they're all magnificent feats of open-world post apocalyptic exploration that PC owners must experience. Thanks jaystan!
I once wrote an article about how a hole in a fence proves that STALKER is brilliant. See also: Why We Love... A Gap In A Fence (And S.T.A.L.K.I.N.G.)