Could there be a category for a Portal Series run? It could be as short as just Portal 1 and Portal 2 or you could add Portal Stories: Mel and other mods. If this is a possibility then I would gladly run it.

Yes Please

yes i would love to run that

we need this

I agree

Msushi had answered this in a DM discussion, so I quote him here (with permission):

"i dont know who i talked to about this but basically the huge question is the run would probably include mods and theres a gray area of what portal should in the "series" run and what shouldn't be
rexaura, gamma energy, portal Pro, portal stories mel, aperture tag, 2 memories, which ones make the cut?
thats why its hard to define and make a category on because of these mods
realisitcally do whatever run you want and if like it it'll get added"

I would've thought just portal 1 and portal 2

I don't know that much about the Portal series, but I would say a full series run (including spin-offs) consists of 6 games:
Portal - Out of Bounds
Portal 2 - Single Player
The Lab - All Experiments
Bridge Constructor: Portal - Any%
Aperture Hand Lab - (Category Pending)
Aperture Desk Job - Any%

I can add a Portal Series that consists only Portal 1 & 2 when there is at least one run of it that you can submit for the leaderboard.

For the spin-offs, I'll leave that up to Msushi's decision.

For the mods, it's kinda debatable if we should add those here at all, since the name of the leaderboard page suggests Multiple Valve Games. On the other hand, I would want those myself for HL2 mods' purposes, so I'm asking that from Msushi as well.

I don’t actually have most of the Portal games I was just making a clarification of which games should probably be in a run if you include spin-offs

All in all, it really depends on someone actually doing a run of a multi-game concept before it'll be added as a leaderboard, empty categories are pointless.

@LyrenLyren What's the point of the Half-Life Series category then?