With the latest update to Mac OS, Catalina, apps that are 32-bit are no longer supported. This means that a vast majority of our older games will cease to work and this is nothing that will be fixed from our end. Legacy games are several years old and no longer in development, hence the problem with them not getting fixed.
PCMagazine made an article about this (https://uk.pcmag.com/news-analysis/123012/how-to-run-32-bit-apps-in-macos-catalina) but in case it's no longer available this is what they wrote:
If you need to run a 32-bit app, Apple unofficially recommends either that you keep an old Mac on hand that runs a pre-Catalina version of the OS or that you partition your current Mac so that it can start up with an older macOS version as well as Catalina. Both methods work, but both seem to me inconvenient and time consuming. There are, however, better alternatives.
The easiest method is this (but keep in mind that it costs money): Buy a copy of Parallels Desktop or VMware Fusion if you don't already own one. These prorgrams are designed mostly for running Windows on a Mac, but you can also use them to create a virtual machine that runs macOS in a window on your Mac desktop. Parallels is easiest to use, but VMware Fusion isn't far behind.