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I recently got Moonrakers, and it is 10/10 in my opinion. It can be competitive, and the rules certainly support backstabbing and sabotage, but it can be played very cooperatively. There is a winner, but you could even modify the rules to “try to get everyone to 10 prestige in x number of rounds” instead of first to 10 wins.
I gave up prepping “main quest” stuff when my players wanted to find out more about some curse affecting them, and decided the most logical thing to do is kidnap the head of their religion (who one of the players directly reports to), interrogate him, and hold him hostage. Instead of, you know, asking 😅
They eventually backed off of that plan due to concerns of some other PCs, but it was pretty close