Where can I find every Overwatch character origin story?

You can find them on the official Overwatch website. They have detailed descriptions and sometimes even animated shorts that showcase the origin stories of the characters.

The in - game lore sections might also have some bits and pieces about the origin stories. Additionally, the Overwatch comics are a great source. They expand on the characters' backgrounds and how they came to be in the Overwatch universe. For example, the comics might show events that led up to a character joining Overwatch that aren't fully explained in - game.

You could also check out some of the official Overwatch YouTube channels. They often release videos that either directly tell or give hints about the origin stories of the characters. Fan - made wikis can be useful too, but be careful as they might not always be 100% accurate. However, the official sources are always the best place to start for accurate and detailed origin stories.