

Get your games as GOG Offline Installers. Burn them onto M-Disc Media. Supposed to last 1000 years. Terribly slow to burn at the suggested x4 speed but after it’s done you got it forever! Then if you’re really serious, use the 3-2-1 rule with 3 copies, on at least 2 different media, and with 1 stored off-site.
We need to install fusion rockets on the far-side of the moon and crash it into Earth! All Problems solved!