I remember Addy.. Boy, that's long ago now. Back in the late 90s/early 2000s,
Addy was being praised as being innovative and such. I also remember there was a TV advertisement or something.
Anyway, the press was very positive about it. Short footage was seen in shows like nano, C't magazin, etc. 😀

1. Create a directory, e.g. C:\COKTEL\ADDY4
2. Copy MDOGAMES.INI from CD 1 into this directory
3. Create a subdirectory called SAVEGAME in this directory
4. Open SETUP.INF from CD 1 in a text editor
5. Search for ;create savegames directories
6. Find the MKDIR SAVEGAME\GAMENAME *DESTDIR line for your game and create a subdirectory called GAMENAME in the SAVEGAME directory
7. Determine the path of the exe file of the game you want to start, e.g. GAMES\BEEBOP1\BEEBOP1.EXE
8. Open INTRO.STK from CD 1 in a hex editor
9. Prepend the exe path with <CD> and search for it in the hex editor, e.g. search for <CD>GAMES\BEEBOP1\BEEBOP1.EXE
10. Copy the null-terminated string of the first occurrence into a text editor, e.g. <CD>GAMES\BEEBOP1\BEEBOP1.EXE 290869 <ME>
11. Replace <CD> with your path to CD 2, e.g. D:\
12. Replace <ME> with the path to the directory that you created and append a backslash, e.g. C:\COKTEL\ADDY4\
13. The resulting string should look like this: D:\GAMES\BEEBOP1\BEEBOP1.EXE 290869 C:\COKTEL\ADDY4\
14. Use this string to run the game

Some of the games are "Click & Create" games. They can be identified by the presence of a CCA file in the same directory as their EXE file. It seems that these games do not need any secret command line arguments. However, you have to specify the path to MDOGAMES.INI in your clipboard to start them. So if you used the path from above, you would have to copy C:\COKTEL\ADDY4\MDOGAMES.INI to clipboard in order to start the game.