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Sorry for taking some time to test this. I have tried running the game as-is in compatibility mode, but it crashes when trying to start a match, only menu works. Fully rebuilding the game in compatibility mode prevents the crash, but the graphics are broken, it would require a lot of changes to make it work as expected.
I’m afraid not. It’s not about optimisation - different renderers require completely different settings. It would be almost like developing two different games.
I have re-enabled the download for version 0.4.0, it contains all of the single player content, uses previous version of the engine and maybe will work, but no guarantees.
You can force Godot games to run in OpenGL by running them with "--rendering-driver opengl3". ToF2 is far too powerful for my machine to test thoroughly but it seems to have loaded faster, and I don't remember having any issues with anything else I've tested with it so far. (There are some minor differences and lack of some newer features of course, but nothing major from what I've seen.)
I remember there was one that came with a bat file for this so you wouldn't have to figure it out yourself, so if it works without any issues you could include a bat/sh script too.