I feel like you might've heard of ‘Space Rangers’ (just ‘2d space trading with pirates’ does rather hint at it), but if not—it's about a third to a half of what

I feel like you might've heard of ‘Space Rangers’ (just ‘2d space trading with pirates’ does rather hint at it), but if not—it's about a third to a half of what you described, plus some other stuff on top. IDK if they ever made it multiplayer, though—maybe in the Steam release.