Space pirates!
I buy 99% of my RPGs only in PDF these days, but when a product as special as the Pirates of Drinax (paid link) ) campaign for Mongoose Traveller (paid link) comes along, my heart goes pitter-patter and I have to make an exception.
It’s a sandbox campaign with a fantastic hook: The ruler of once-great Drinax, now a stellar backwater between two great powers, gives the PCs an old ship and a letter of marque, and asks that they secure the allegiance of the nearby worlds.
But, you know, they’re motherfucking space pirates: They can do whatever the hell they want, and the campaign supports it. There’s a neat system for tracking (and changing) how every important planet feels about the PCs, with real consequences waiting in the wings.
Need a bit more structure? The core is 10 adventures that can be run more or less in any order, anywhere. Some are opportunities signalled by rumors, while others are driven by outside forces. All adjustable to your game, of course, with copious notes about how to do just that.
Plus all the great tools I expect in an old school space sandbox: NPCs with motivations and roleplaying tips, ships, planets, deck plans, a gorgeous poster map, tons of info about the Aslan (who are key players in the region) and more. Its roughly 600 pages of material.
From what I’ve read so far, this is a stellar campaign.