Fallout New Vegas, a game which is unfinished (not at Obsidian's fault, bethesda rushed them, look into it if you care) and yet one of the best in the franchise. If it wasn't for mods, this video game by itself would be a 3 or 4 stars but thankfully, Bethesda, despite being a questionable company at times, does believe in modding, and as such the Nexus and a few other websites contain thousands of mods for this game. Want the best fallout experience? I highly recommend to look into Tale of Two Wastelands, which combines Fallout 3 in FNV into one game and further extend your time in the wastes.
