I will ALWAYS recommend this!
The Beast of Graenseskov, written by EN World's own @Quickleaf.
It's an amazing (and complicated af lol) example of a mystery sandbox adventure. Mystery adventures are really tough to write - and run! So are sandbox adventures. This one is both!
And even if you never run it, there is so much material to salvage or again, just read it as a study in mystery sandbox writing.
Oh, and Quickleaf, if you read this, you still haven't answered my message.![]()