Once I downloaded this I sat down and read/watched it cover to cover. RGM is exactly the tool I've been needing, and this unreasonably thorough guide really sealed the deal.
Near the beginning you say this tool can only be used for FPS games where you shoot things, and that seems like a challenge. I'd been planning on making a narrative adventure game in RGM even before I read this lol. You laid out the exact limits of the engine so well that by the time I'd finished reading I'd already figured out the basic design.
Thanks! Your work is much appreciated.