Steam popped up today to inform me about the Unreal Tournament pack they're offering. While looking at this, and clicking various links, I ended up on the Unreal Tournament website, where I noticed a remarkably familiar face. Some illustration (click for full-size):
At some point, Epic probably decided that Marcus 'Gravel Voice' Fenix is the manliest man dude fella they ever thought up, and thus decided that he would make an appearance in all their future games. After all, games are great for modular programming... why make new characters when you've got all the models from the ones you already made?