So I was watching The Expanse again, and it got me thinking: is there any RPG out there with realistic gravity well travel rules?
There are some that gave it a try, of course, but they always end up abstracting some part of it. GURPS Transhuman Space was probably close to The Expanse, but while the thrust and fuel was there the position of the planets was somewhat abstracted.
Problem is that to have realistic space flight you need to track the positions of every planet so that you can accurately plot a course and thats simply not worth it.
Have you looked at the Expanse RPG? I thought that it was a good balance: a bit of hard sci fi, but workable mechanics. For more technically minded groups you can dig harder into the science, but you can hand wave some of the space travel rules if that is not your jam without breaking the game.
I played the game with engineers in the group, but I'm the type of GM that is happy to have players do some of the rules heavy lifting. I was less intimidated about the space-travel mechanics in The Expanse RPG than the lore.
I like The Expanse RPG as a game system, but I prefer systems that don't have a lot of lore from wildly popular books, TV shows, and movies.
Also, I personally find more hard-science or reality-bound RPGs less satisfying than fantasy. Space fantasy is more fun for me to play than more reality-grounded systems.
I’m reminded of this image:Nobody other than rocket scientists and astrophysicists actually want to do orbital mechanics, so... no. Not as far as I am aware.
Traveller assumes constant thrust drives without significant reaction mass. Except in Traveller: The New Era. That one is still unrealistically high delta-V but it's at least using the rocket equation and limited thrust... albeit ships often having 5-20 G-hours of fuel.Various Traveller editions have timing for leaving a gravity wells based on thrust of the ship.