Hmm, Epic Games stopping development of Unreal Tournament revealed something interesting for GOG too: https://variety.com/2018/gaming/news/unreal-tournament-not-in-development-1203080017
“‘Unreal Tournament’ remains available in the store but isn’t actively developed,” he told Variety. “We’ve recently worked with GOG on making classic Epic Games titles available and we’re planning to bring more of them to the store in their original glory
Hope we finally see UT3 to complete the set, besides I can't think of any other Epic games but maybe somebody else has a list.
Also have we seen any 'recent' Epic games on here or is he refferring to all the old stuff that has been here for years lol.
also be referring to games that they published and might
still hold the rights to, games like Solar Winds, One must fall and others.
(underlined because this is only a theory, you could be very likely correct too)