I spent about 4 hours practicing each of the first 10 levels individually (with weapon carryover), and figured I should give full game a go. While I didn't get sub-20:00 D2ALL in this session, I still got the first sub-5:00 (and first sub-4:55) Doom II E1 run. Can be better, but most maps went exactly as planned. See YouTube video for more thorough description.

MAP01: 5.26 :)

MAP02: 29.29 :)

MAP03: 22.83 :)

MAP04: 24.20 :|

MAP05: 24.97 :(

MAP06: 47.80 :))

MAP07: 11.51 :))

MAP08: 25.00 :)

MAP09: 49.60 :)

MAP10: 25.86 :)