Where is a CODELESS free complete 3D game engine easy-to-use?
Right now Core is pretty much the closest that's ever existed.
This probably won't exist because the performance and customization benefits of coding are pretty much impossible to ignore. Once you learn how to code, you won't want to go back - that's a fact. Lua's not so bad to get in to, but learning in Core might not necessarily be the best way in my opinion because learning about networking and multiplayer stuff can be overwhelming. Maybe take a crack at trying to make a Discord bot in Lua or something and then once you've done that move on to something like Core. That's not to say Core isn't a great place for learning Lua but it's got a few more things to manage than some other Lua applications!