Thanks! If I'm not in free play, will those technologies never be released?

I can download a mod to get all of them, I think,. However I figured they would all be released in the full game after I reached some milestone. Are those the only ones that will be available?

Hello. I am really enjoying this game! I finished the tutorial and then finished all the research/technology available at that time. I know there will be additional technologies, but I don't know what I need to do within the game to get them added to the tree. Is there something I'm missing? I ...