The key to any successful pro-sport is to be family-friendly. That means, Quake needs to add as much sex and violence as possible. I'm talking about, if a child even looks at a game of Quake, he or she will be permanently ruined.

To start, all the female characters should be naked, and constantly on their periods. Maybe you could add a new weapon, which is basically just menstrual blood that the female characters shoot out of their snatch's. Another weapon could be an aborted fetus gun. Like, the male characters could have a rape-gun. If they shoot a female character with the rape-gun, she gets impregnated. She can then abort the fetus into a weapon, and shoot the fetus at the rapist (or someone else, if so inclined).

For the males, they should all have rape-guns. The rape-guns work on everyone, but if they hit a female character, it will impregnate her, and then she can use the aforementioned aborted-fetus gun as retaliation.

That's all I have for now, but definitely more sex and violence. Pro-sports need to be family-friendly.