So I have 2 versions of this game in official CD-ROM releases: the original 1996 copy, and the Limited Run Games version. I've installed both versions and neither have the IGT/mission summary screen at the end of mission 5.
I've started downloading "abandonware" versions and haven't had any luck in finding any that work.
Is there anyone out there that can help? The sticky asks me to download an althub... I can't find those either! Where are they? How do I install one? Someone, anyone, can you help me?
(I should note I prefer to run this game on a non-Windows 10 PC. I've been attempting to run it in 98, and in XP via DOS-Box, and it runs just fine minus the lack of the post-mission screen)
I ended up just frame-counting the final mission from end-of-melt (between missions 4 and 5) and the final frame before the screen melts away at the end of mission 5.
I had to run obscure games like this for a project I did from 2018-23 that involved speedrunning 200 different games lol. I got used to this.
Let me see... the way I timed my run in 2023 was: time began on selection of difficulty (Extreme Ooze), and ends at fadeout when you end the last mission. I had to run RTA.
I believe only source ports show the time on the final screen of mission 5, not the original executable. I think that feature was added later by the community.
Then you should use a source port to see the total in-game time.
I recommend dsda-doom, currently the most popular one for Doom engine games speedrunning:
dsda-doom v0.29.4 [2025-09-026] - Source Ports - Doomworld
But there are many more out there. Some examples:
