The Team Fortress 2 that we know and love underwent a ton of changes during development—enough that it's fascinating to look back on the rich history of the game, if not the franchise itself.
- Which class is based on a glitch
- How the franchise started as a modified version of Quake made by Australian college students
- How/when Valve got interested in the project
- The visual changes that Team Fortress 2 went through before release and where the current visuals take inspiration from
- How the game used to have classes called 'commander,' 'officer' and 'instructor'—and how all these classes functioned
- What Team Fortress 2 was almost called
- How the devs made 3 versions of the game before settling on the current one—and how one of these versions was essentially humans versus aliens
- How the game used to feature way more grenades, but they were taken out because people might spam them too much
- Which class was tweaked so as to avoid racism
- What some unused music sounds like
- Explanation of what some of the game's bigger references are
- How there's a small chance the scout's death will result in a dove
Personally, I love it when glitches are embraced by developers and then actively incorporated into the game—reminds me of how Street Fighter's combo system started out as a glitch, too.