PixelBoy: Anthology is on Steam, but with a new publisher.
Starbreeze Publishing AB? Their Anthology collection is not sold on Steam anymore.
PixelBoy: Anyway, the big question is, why was Anthology never on GOG?
And if we talk about Good Old Games, one of the games in that collection is "Defender of the Crown" which is an undeniable classic.
The game also has a sequel, a remastered version, and not one, but two remakes.
So let's hope that it will be available on GOG soon enough. None of them have probably stood the test of time entirely, but they are games that should be available.
The games in the Cinemaware Anthology: 1986-1991 plus The Three Stooges and TV Sports Hockey were released as freeware on the Cinemaware website from about 2002 until 2016. I still have the files archived on an old HDD. They released ROMs and disk images for the Amiga, DOS, NES, GameBoy Advance, Amstrad, C64, Atari ST, TurboGrafx etc. versions. For Defender of the Crown their website offered the Amstrad, C64, Atari ST and Apple IIgs disk images, the DOS versions (CGA, EGA), the NES ROM and the CD32/CDTV images for free. They sold remastered versions of some of the games, e.g. a digitally remastered collector's edition of The Three Stooges.
Imho, these games should be made freeware again.