Dukk Borg is a Mork Borg supplement that swaps the somber cold of Tveland for the wild high energy colorful cartoon gloom of Calisota.
The same rules set is used, and it's fully possible to port over human characters from Mork Borg to Dukk Borg, but there's also plenty of new mechanical options like clans, and it has the energy of a standalone.
Dukk Borg being released in stages, so both the length and content will increase, but its round 1 (the only round available at the time of writing) is eight pages. Like Mork Borg, the layout is expressive and punchy, and there's a high density of amazing art and cool design.
Writing-wise, Dukk Borg is glorious. It knows exactly what it's doing and how silly its straight-faced Duck Tales OSR concept is, but it commits. It's easy to get immersed in this tale of duck liches and cruel wealth, and that takes some serious chops to pull off.
Content-wise, the addition of clans is very welcome, and adds some extra cohesion and tension to the PCs' party. There's a lot of color here, some of it literal, and clans also add extra mechanics and hooks for the squad.
There's also a new class, and a few enemies, and hirelings. The class---treasure hunter---has some potential extra wealth, but doesn't feel especially powerful compared to the classes in core. However, the monsters and hirelings scale with it, so this is likely the intended balance for the setting.
Overall, if you're looking to get in on the ground floor of something that's fun and an absolute treat to read, and if you don't mind the Mork Borg ruleset, I *strongly* recommend Dukk Borg. I can't wait to see what the other rounds are like.