For a long time I've tried to get a good RPG setting going for BT. I know there's an already written RPG for the game but tbh I don't really like it. For a while, I thought about making a bare-bones RPG myself that used the same base mechanics scaled down, but I found it was just too crunchy and slow. Now, I'm thinking that since the game will get very crunchy and simulated once it steps into mech combat, it can probably be narrative and story-based for the out-of-mech sequences. Since my favourite RPG is hands-down Blades in the Dark, lately, I've been thinking of writing a Forged in the Dark system game for battletech.
This is getting pretty niche so I'm not sure if I'll find enough people who play BT and know FitD well, but I'm curious if anyone in here knows of an existing FitD build, or other more narrative-focused RPG, that would be easier to adapt to BT.
I can't answer this, but I do have a question: Which RPG system have you looked at? Destiny (MW:D) or Time of War (ToW)?
A friend of mine and I were looking, and it appears ToW is 4th edition and MWD is 5th edition of the RPG. However, ToW is still supported -- a new print was just released by Catalyst last year, even though the original print was more than decade ago. MWD was released in 2019.
I'm running a Destiny game, and it's a lot of fun. But there's a lot of crunch missing that might be available in TOW.
Edit: I just saw the age of this (how did I miss it?) and your post in RPG. Yeah sounds like you'd like Destiny. Really unique system not too obsessed with crunch.