The undisputed king of the "Freeplay" experience. Anomaly is a standalone mod (you don't even need the original games installed!) built on the 64-bit Monolith engine. It combines maps from all three games into one massive Zone.
For those who think the original Zone was too easy. OP-2.2 is the ultimate "kitchen sink" mod. It includes thousands of new quests, hundreds of weapons, and secret stashes that will test your patience and sanity. stalker globalnye mody skachat
For the most stable versions and English translations, the best places to look are: : The central hub for the Russian modding scene. The undisputed king of the "Freeplay" experience