Games from that time were actually running mostly in your browser. Meaning that the host, for example Miniclip served you the JavaScript and other files of the game which were then executed locally. So technically you could archive those games as long as you can load them up at least once initially.
Linkwarden - An open-source collaborative bookmark manager to collect, organize and preserve webpages (lemmy.world)
Greetings everyone! Daniel here, I’ve been working on Linkwarden part-time over the past few months....