Old but new is a set of modpacks that replicates versions of minecraft from minecraft alpha 1.2.6 to beta 1.8.1, and even emulating if Minecraft where on the hit console, Playstation One

All of it is free and open source on github and Modrinth, where you can download and see what mods and configs i usesd to get the best old minecraft expereance, whith new minecraft.

You can download this game on any device that can use and download Modrinth packs, like Pojav, Prism, MultiMC, PolyMC, And the modrinth launcher. So go try it out!