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[Cire]

Originally Posted by MrFlibble

You're welcome

They run quite well in DOSBox to the best of my knowledge, and what's more, MBF has built-in support of the beta as well.

Yep, they run nicely in DOSBox, though the default control scheme is a bit cumbersome imo, and I don't think they can be changed. I don't think MBF can use the actual beta IWAD, it uses beta resource PWAD's with the Doom 1 IWAD, though please correct me if I'm wrong. (Win)MBF and ZDoom has partial support for the beta, not enough to run the IWAD without modification though. You can use SLADE to convert the alpha/beta graphics to the Doom format that source ports can read and Yadex to convert the alpha levels.