Is that actually challenging? My MC launcher can pull in 1.7.10, add a mod loader, and load mods into it just fine. Do you mean if you try to run a 1.7.10 mod i

Is that actually challenging? My MC launcher can pull in 1.7.10, add a mod loader, and load mods into it just fine. Do you mean if you try to run a 1.7.10 mod in a modern MC version? That's not a realistic goal because of dramatic API changes between versions. There are a number of breaking versions that require basically rewriting mods. But you can still play the on the old version and most modded minecraft players are many breaking versions behind by default. This is the norm in most games, where game updates are routinely expected to break all backwards compatibility. And considering modding minecraft has never been officially supported, it's surprising it works as well as it does. I'm playing a 1.7.10 pack lately actually, still just as good as when it came out!