The Nyarlathotep expansion—we play with the Big N and the Dark Pharaoh herald.
Played this once, and incorrectly. The experience was... diluted. Looking forward to playing this for reals.
UPDATE: The problem with the first play was running the Permanent Exhibit with all the cards shuffled into the base game. This made the Dark Pharaoh cards very rare and the game near-indistinguishable from a base scenario. For our second play we used only the DP cards (replacing the Mythos, Gate and Arkham Encounter decks) and it made for a sweet bit of ugly: things looked utterly bleak by turn two, and when Nyarlathotep arrived (something that never happens to us anymore in the base game) we had only shut a single gate. Two players got scrubbed and it literally came down to the wire before we beat him back and shut him out of our world.
Only really necessary if you play this game an awful lot, and love it accordingly. The wooden king piece is nice, but I already had a weighted Staunton king that I spray-painted gold and accessorized with purple felt... The replacement cards are nice, but I already keep 'em in sleeves... So, in the final analysis, all I really get are the new district cards.
I have to say, in all seriousness, my favorite part of this expansion is the box. It's much smaller than the original and has a nice linen finish AND IT HOLDS THE ENTIRE GAME!!! At last, I have a nice box that matches the form-factor of the game itself.
PURGED as redundant since acquiring the 2005 FFG Silver Line edition of the base game with the expansion included.
Giving this a tentative 7. It's got a lot going for it on the surface—portability, theme, art—but the simple system feels just the littlest bit clunky. If it smooths out with more plays, I could see this being a staple... we will see. (2-player with adult, 3-player with kids. Everyone had a good enough time.)