Anyone know if the rpg is any good?
If memory serves, there have been a total of four different MechWarrior RPGs:
1st Edition used its own unique game mechanics that were evidently about half completed when the book went to print. The combat system was genuinely unplayable.
2nd Edition was based heavily on the game mechanics from Shadowrun and it played pretty close to how SR2 played. For some reason they combined Intelligence and Dexterity into one super stat (called Reflex?)that dominated all skill and combat checks. Bad idea.
I don't remember much about 3rd or 4th Edition except that 4th had a kooky lifepath system in which you made up what you wanted your character to be like and then rolled randomly for how he really turned out. Your character had very little chance of turning out the way you wanted, and most people I've talked to ignored or modified the lifepath system.
I think the later editions (any except 1st) were decent and playable. My gaming group many years ago liked one set of the rules (4th?) well enough that we made it the basis of our own RPG that we never finished.