For me you can't beat STALKER. I have tried pretty much every game out there but have found none that put me where this game does. I start playing and get lost in a world that can be both beautiful and terrifying. I remember my first visit to the Yantar lab in SHOC. It was in the early hours of the morning, I was using headphones while sneaking around the lab. The atmosphere had me on the edge of my seat. Ten seconds later something totally unexpected happened and put my heart in my mouth. I paused the game, shaking like a little child and from that moment on for me it has been the stick by which all games are measured. And sadly they just don't measure up. STALKER is a thousand games in one. Set in a constantly changing, evolving world. The only time any two playthroughs are the same is when you hit that ENTER THE ZONE button at the start of the game.
Rather late in the game. While testing and rewriting I've been rushing through emissions by using anabiotics. Then I decided to watch an emission. The sky's are broke, We get no changing sky, It was a bug we found in the Russian made merge patches back with SGM 2.0. Luckily Cromm Cruac made us a merge patch for 1.7 so it was fixed through that but I nearly missed it. This is why mods need to be properly tested and not just put up as there found. I mean I'm on my third playthrough and that is a big bug too miss.