Try pure DOS mode. Some games will not have sound (some Ultimaīs) in a Win environment or will not be able to open at full screen. Thatīs why some need to use more memory and you have complete control in DOS.
Use this boot disk to boot in pure DOS:
Boot disk
and run the games from the command line. Follow the instructions to have your video drivers loaded for DOS and have more speed and compatibility with the OS the games were made for.