Apogee HD Titles - Technical Overview (GNU/Linux centric)

To give some details about GNU/Linux versions of the (currently) three 'HD' titles
of Emberheart Games & Apogee Entertainment available on GOG (for Linux & Windows)
(incl. reference to the formerly DOSBox versions available on GOG):

Monster Bash (freshly released 3rd 'HD' title):
   * Monster Bash HD (improved and extended by Emberheart Games) . . 29.10.2021
   o Monster Bash (old DOS version now running by DOSBox) . . . . . . . . . 09.04.1992
# DOSBox: 14.0 MB; Unity (HD version): 158 MB
# HD version: Unity 2019.4.19f1, pure 64 bit, internal version 1.1.5.1 (20.05.2022)
## Note about missing GNU/Linux version on announcement day (29.10.2021):
## Linux version got available on 03.11.2021 about 14:00 CET on GOG Offline Installer.
* GOG Announcement of Monster Bash HD - 29.10.2021 18:00 CET
* Trailer
* Monster Bash HD Changelog - starting with 29.10.2021
* This document in the forum of the 3rd 'HD' title

*Secret Agent* (2nd game available with 'HD'):
   * Secret Agent HD (improved and extended by Emberheart Games) . . 30.06.2021
   o Secret Agent (old DOS version now running by DOSBox) . . . . . . . . . 01.02.1992
# DOSBox: 11.8 MB; Unity (HD version): 165.3 MB
# HD version: Unity 2019.4.19f1, pure 64 bit, internal version 1.0.4.201 (30.07.2022)
* GOG Announcement of Secret Agent HD - 01.07.2021 15:00 CET
* Trailer
* Secret Agent HD Changelog
* This document in the forum of the 2nd 'HD' title

Crystal Caves (1st game available with 'HD'):
   * Crystal Caves HD (improved and extended by Emberheart Games) . 15.10.2020
   o Crystal Caves  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23.10.1991
# DOSBox: 12.0 MB; Unity (HD version): 186.9 MB
# HD vers.: Unity 2019.4.19f1, pure 64 bit, internal version 1.1.3 (19.08.2022)
* GOG Announcement of Crystal Caves HD - 15.10.2020 15:00 CET
* Trailer
* Crystal Caves HD Changelog
* This document in the forum of the 1st 'HD' title

I am pleased by the new technical base, the improved image and sound quality and
assignable keys and buttoms and full controller support (tested with Logitech F310).
DOSBox is no longer maintained as before - and normally does not really use
fullscreen but changes resolution, the controls are not direct as under DOS,
scrolling is ugly, original colors are lacking ... so this update is not only
nice and keeping the style of the original work - but badly needed technically:
Really a good thing for gamers ... especially for those brilliant Apogee titles ...

And we may soon get more of these games - like:
   o Cosmo's Cosmic Adventure (03/1992)
as was announced by Apogee Entertainment here:
   * https://www.youtube.com/watch?v=sHTbZdV2l8s
and even a level editor shown on Emberheart Discord server.

And thanks to the Dev - Primož Vovk - who is caring about game quality,
is fast in answering some questions and does a really good job!

I am longing to play more of these HD titles:
       *** Apogee games still rock !!! ***     ; )


P.S.: I will try to keep this current (see 'post edited' date below) ... technically and about new HD titles to come ...