Making Gameplay Eligible on IMDb

Other than voice overs, what else can be done to, or added to, gameplay in order to make it eligible to be listed on IMDb?

I know (or at least I assume that) that machinimas are allowed, since it most likely will have a separate narrative from whatever game it was recorded in. Not to mention all the other work which make it different from the original game. However, I am still unsure what would need to be done if the video consists of gameplay. Would the addition of credits and title cards and numerous clips edited together to form a sort of vague or loose narrative make the video eligible for addition to IMDb?