Amazon has announced its Prime Gaming October update, which sees it add a fresh batch of games that users can add to their libraries for free. The most noteworthy additions are probably Fallout 3: Game of the Year Edition and Fallout: New Vegas. With the second season of Prime Video's surprisingly excellent Fallout TV show arriving in December, it's an ideal time to acquaint yourself with the games it's based on. New Vegas is particularly relevant, as season two looks like it'll primarily be set in that game's world and will presumably be heavily influenced by Obsidian's beloved 2010 RPG.Beyond that, XCOM 2 is probably worth a look, and there's a handful of games that are giving Halloween vibes -how can you go wrong with Tormented Souls or Hellslave as we approach spooky season?Here's the full list of October games that you can claim for free. Most come in the form of codes you can redeem on GOG, though some others are available on the Epic Games Store or Legacy Gaming.