Think about this, memory equates to performance.  Since most gaming software contain graphics and animations that require high resolutions, adding memory will definitely boost the performance of your computer when you run them.  A 256MB memory is considered to be the minimum requirement for a high end gaming machine.  For serious gamers, a 1GB memory is recommended for highest quality resolutions.

Adding memory may be very sensible, however, you also need to consider the operating system as a limiting factor.  Windows 9x doesn’t do much for memory handling so even if you install sufficient memory it may not do you good at all.  To optimize your memory management, Windows 2000 or Windows XP would be best.