Windows 7

One of the best versions of Sid Meier’s Civilization series is Civilization III released in 2001. However, it will only run under Windows 7 with a physical CD mounted. I first tried it on a physical machine but it stopped working and I decided to give it a spin as a virtual machine under Proxmox. The Internet Archive provide a copy of the Windows 7 ISO. The Proxmox web site provides a Windows 7 guest best practices document. It requires mounting additional VirtIO drivers during the installation.

Windows 10

Windows 10 also has a best guest practices document.

MacOS 14 Sonoma

Here’s a video by i12bretro on installing Sonoma as a guest VM with a a checkling on github. I think this guide will help, too.