There's a guide on Steam with some: https://steamcommunity.com/sharedfiles/ ... 2823667553

The settings files also alludes to "rico" mode, but I couldn't figure out how to activate it

I got into a stalemate situation on the Guardians of Steel mission where I went through thousands of units. My framerate started around 100 FPS, and by the time I gave up I was getting 6 FPS. I suspected a memory leak of some form, but restarting the game/computer didn't fix it. What DID fix it was ...