Look under the "Shadow of Chernobyl" patches section. 3. Installation Tips
While version 1.0001 was the very first update released shortly after the game's launch in 2007, it is rarely used today. Most players aim for (for specific old mods) or 1.0006 (the final official stable version). 1. Why version 1.0001? Look under the "Shadow of Chernobyl" patches section
If you just want a stable game, and go straight to 1.0006 . Better yet, look into the "OGSR Engine" or "ZRP" (Zone Reclamation Project) . These aren't just patches; they are community-driven updates that fix thousands of bugs that GSC Game World never got around to fixing. Most players aim for (for specific old mods) or 1
Back then, patches were region-locked. You need the specific WorldWide , US , or CIS/Digital version of the patch to match your game disk/install. If you just want a stable game, and go straight to 1
Some "purists" want the game exactly as it was in March 2007 with only the most game-breaking day-one bugs fixed.