Yes, that's right, you can now explore the world of Far Cry 3 within Minecraft. Visit the airstrip, climb the hills, get lost in the jungle and see if you can find some of the dozens of secrets that are hidden in this tropical wilderness. Even Vaas is in there somewhere.
In fact, there's lots of custom blocks, weapons, tools and mobs. You can download it right here in the form of a fairly slim, 25Mb .rar file which contains all the instructions you need to start playing.