Is there any such thing as a "Universal Demo?"

[StarSpun5000]

As in, is there a demo that when played with any map of a certain wad (Let's say Doom II for instance) the demo can beat that map. Where the inputs are always the exact same between maps, but it can still beat all of them. Does this exist?

[dasho]

Like an extremely long demo with enough brute force inputs to somehow beat every level regardless of structure? Maybe I'm not reading this right.

[StarSpun5000]

Yeah I had I feeling. It's a bit difficult to explain properly. What I mean is one big demo which can be played with any map in a certain wad and can beat that map. Essentially a set of inputs that can beat any map in a certain wad.

[Shepardus]

There's at least one case I've seen of a single demo that completes two dissimilar maps, though I don't remember where to find it. It's not a generally solvable problem, though, i.e. you can't necessarily do this for any set of maps.

[Big Ol Billy]

Seems unlikely, but there are precedents for this kind of thing admittedly! 

 

[Roebloz]

I don't think there is a bruteforced demo, and it would hardly be possible to make in the first place. Now as for a bot that plays Doom on its own, now that's a different story.

[SleepyVelvet]

1 hour ago, StarSpun5000 said:

As in, is there a demo that when played with any map of a certain wad (Let's say Doom II for instance) the demo can beat that map. Where the inputs are always the exact same between maps, but it can still beat all of them. Does this exist?

I've thought about this a while back too, but with the -nomonsters flag of course.  It'd be a cool navigational puzzle to see how many simultaneous map exits you can cram into one demo lmp, if not all of them. 

 

And then afterwards, seeing them editted together in a massive splitscreen display video would be interesting to watch.

 

The first tactic I'd try is funneling the playing into a cubby per map, keeping them safe and snug in nook-or-cranny somewhere, and slowly unravel one map at a time while trying to keep the player from breaking loose in the "other maps".  If this works, it may be a boring solution, but it's the first to come to mind.

 

But yah I like the concept.

Edited July 16, 2022 by NoisyVelvet

[Solmyr]

That's sounds unlikely, and would be an exasperating thing to witness, like "Twitch Plays Pokemon" but in Doom. 

[Shepardus]

I found what I was thinking of:

This is a map that was created so that xit-vono's 0:39 UV-Max demo of Doom II's MAP01 would also complete this map.

[ImproversGaming]

Have a look at this one, it provides some nice insights. This is SoBad playing two different doom maps at the same time.

 

[Andromeda]

Well, there's this movie of Hell Revealed on ITYTD:
https://dsdarchive.com/files/demos/hr/42508/hrall-4339.zip

 

When played back with Doom II instead, the first level gets completed at some point.

Edited July 16, 2022 by Andromeda
not TAS, sorry for the misinformation