How I think game design should work

So… maybe I WANT to know how to make a WoW clone, a Halo clone, a CoD clone, Sc2, GTA. I don’t care if you think its garbageware. And I’d prefer stuff with no story in exchange for raw content. I’d rather WoW have 100 classes then a bagillion quests. Or halo to have 100 weapons and maps instead of a campaign.