Koroush has posted his TweakGuide for S.T.A.L.K.E.R. already. Anyone out there playing this new FPS ought to get on over & give it a look. Always good stuff.

"It has elements of both: you have a relatively large, somewhat non-linear game world to explore (called 'The Zone'), with various missions and tasks that you can choose to undertake as you see fit. However you also have to be handy with a gun and have quick reactions if you want to survive long enough to complete your missions and receive your reward."