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)
If you have an active membership, you can often claim various Fallout titles for free through Prime Gaming .
If you're looking for a "proper" and safe way to download games for free on PC, your best bets are through official storefronts during special promotions rather than unverified "full version" download sites, which often carry security risks like malware.