To prepare for the Arcana Check's first official setting, we've updated Death's Door to 2.0. The mechanics are very different, and overall, the mechanic is a lot harder to cheat, and has fewer points of confusion.
The original Death's Door post will be left online for posterity.
Edit:
Updated to 2.0.2 - plugged some holes in the clarity, fixed some typos, and changed some systems that didn't test well.