Tale of Two Wastelands, the mod that lets you play Fallout 3 and its DLC in Fallout: New Vegas, and travel between the two worlds with the same character, has received its long-awaited 3.2 update—a “total rebuild” that has been in the works for more than three years.
The mod will let you play through Fallout 3 and Fallout: New Vegas with the same character, and you can switch between DC and the Mojave Wasteland by visiting train stations.
It sees all of Fallout 3’s quests and settings moved into Fallout: New Vegas’s engine, complete with functioning game mechanics
You’ll need installs of both games along with all DLC to run it, then installing the mod on top of it. You can download it HERE, where you’ll also find full instructions on how to get it running.