An example right now would be doom-4 and doom-2016 for the newest Doom game. Is it just a matter of letting users decide and then delete/alias the less popular one? I'm pretty new to how all this works.
doom-2016 should be chosen as that is the actual name of the game, not Doom 4. Doom 4 should be a synonym, since it is sort of an informal name and most people will probably recognize it as the same game.