If you already own , you can download the massive, professionally-made expansion Fallout: London for free. It is a full-game-sized mod available through GOG.com. 4. Archive.org (Classic Titles)
Occasionally, Bethesda runs limited-time "free to keep" promotions for the original Fallout: A Post Nuclear Role Playing Game to celebrate franchise anniversaries. 2. Amazon Prime Gaming (Luna)
For the original 1997 titles, some versions are hosted on the as part of its software preservation library. While not an official "store," it is a widely used resource for accessing older software. Summary of Reliable Sources Recommended "Proper" Source Fallout 1, 2, Tactics GOG.com, Epic Games Store , or Prime Gaming Fallout 3 & New Vegas Frequently free on Epic Games Store Fallout 76 Prime Gaming or Xbox Game Pass (Subscription)
Frequently available to claim and keep permanently.
Often featured as a free-to-keep code for the Microsoft Store or playable via Amazon Luna . 3. Fallout: London (Free Total Conversion Mod)