This means you’ll be able to browse the codebase, modify the code, share the code, host your own servers, experiment with mechanics, or just satisfy your curiosity about how an MMORPG ticks under the hood.
I think the implication from his reaction to Baldrick’s poem is that he left sausage out on purpose.
Now ‘interfrasticly’, ‘pericombobulation’’ and ‘contrafibularities’ are another matter.
From the linked site’s home page: