RickTommy: 1. Are the games Windows 7 compatible?
2. Are the games Windows 95/98/2000/ME compatible?
3. Are there plans to make them Mac compatible?
4. Is it possible to copy the game files to a disc so you can play the game on an older computer?
1. Some are, there's a topic on that here:
http://www.gog.com/en/forum/general/gog_com_games_working_on_windows_7_64bit_o 2. Only Windows XP and Vista are currently officially supported by GOG, so it's unlikely that their installer will work on older systems such as 95/98/ME
3. Probably not.
4. As others say, that'll probably depend on the game, but it's not officially supported.