TF2 Classic
A standalone mod of Team Fortress 2 that removes all the hats, taunts, and non-stock weapons. It adds a tenth class from the original Team Fortress. Mostly popular due to people trying to avoid the bot crisis affecting the main game.
Person 1: Oh hey you're playing TF2.
Person 2: Yeah.
Person 1: Where're all the hats?
Person 2: Oh I'm playing TF2 Classic
Person 2: Yeah.
Person 1: Where're all the hats?
Person 2: Oh I'm playing TF2 Classic