They are both perfectly fine editors but they don’t hold a candle to a proper IDE

I’m not sure what you mean by “proper” in this context. Every IDE I’ve ever used has seemed like a child’s toy compared to Emacs. An annoying child’s toy with cracks and sharp edges.

I also want to play some games that go beyond the production values of SuperTuxKart and Battle for Wesnoth.

Try 0 A.D. or FreeOrion.

Have you considered using GNU Emacs? Or even shudder vim?

There are plenty of free software games available: https://libregamewiki.org/

I want closed source apps

Ewww