/vr/ - Retro Games

>>8885672
>the game engine itself lacks any vertical movement for the player, outside sourceport mods and the RavenSoftware games also using it?
If by vertical movement you mean jumping, it doesn't have it. You could easily add it to the code when making a sourceport, and this was quickly done when Doom's source code was published, on Carmack's own suggestion, but Doom itself just never had it, they didn't find it necessary I guess.

I don't remember if Heretic had jumping or not, ages since I touched it, but it has flight, and it 'removes' that "infinite height" thing Doom had so that monsters and players can move above and below each other, as well as above and below solid props (Heretic uses this to create magical mid-air bridges you can move under and walk on top of). It incidentally also has the Iron Lich enemy, which akin to the Archie will Team Rocket you, just using a tornado instead of hellfire.

Hexen plain adds jumping proper, as does Strife, I'm pretty sure.
If you add the full collision for monsters and players like in Heretic, and then Jumping like in Hexen and Strife

>>7286962
Yes.