Couple of bugs/exploitable I've tripped over although there maybe more.
On Central Processing (E1M6) its possible to open the blue door without flicking the blue switch.
On Halls of the Damned (E2M6) the fake/trap exit doesn't open on the yellow switch, in a rebuild, it may be an idea to funnel players to that exit first, spring the trap then open up the other door.
On Spawning Vats (E2M7) its possible to trigger the yellow key switch from the ground using mouse look, this can then be used to bypass the blue door area completely.
I'm still playing through, anything I discover I'll post.
Nitronumber9
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