TF2 Classic is a version of TF2 that is re-imagining the release from 2008-2009. You can play with all 9 classes, plus a new class called the VIP. Because of the nature of this game, they strive to remake the original TF2 experience. Whille not 100%, and they do have their own changes, there are no hats or unlockable weapons, but you can still use the original weapons that the TF2 classes were supposed to have, for example, the Scout was supposed to have a nail gun.

If you want to place TF2C, you can go to their official website here: https://tf2classic.com/download.php, and download it from there. Keep in mind, I didn't make this "mod", so please support the original devs! :)

And don't forget:

Gabe's favorite class is the spy!