Guides
Immediately After Putting the Elder Scrolls in Fallout 4, Hero Modder Gets Fallout 1 Working on the Pip Boy Too Guide: Yes, You Can Play Fallout 1 Inside Fallout 4—Here's What Actually Matters
Modder RPGKing117 has Fallout 1 running on Fallout 4's Pip-Boy and terminal screens, following his earlier Morrowind-in-Fallout-4 project. No public release yet, but it's coming to his GitHub and Nexu