Doom Speed Demo Archive
https://dsdarchive.com/

Wad: 	   ZOF.wad
Map:       07
Skill:     4
Category:  UV Max
Exe:       dsda-doom 0.28.3 -complevel 9
Time:      5:58
Author:    ELMLE

Comments: It may be possible to zero press the stair switch so you can release the cyber and get some ammo early, but I couldn't manage to do it in my brief testing so here is a run without it.