Stone Angel said:
Any highlights from previous years past?
I kind of missed that part...
My favorite Halloween Games were the first two I ran.
1) Original CoC rules; I set up an eerie atomsphere, black tablecloth, storm white noise CD playing in the background, dim lighting, etc. The characters were pregenerated PC's who were all on a steam ship in the 1920's, and an aquatic horror had damaged their boat and crawled on board, to stalk them one by one. Crew died or abandoned ship quickly, and the six were the only ones left. The Catholic Priest PC became mind controlled (I worked this out with the player beforehand), and tried to strangle one of the other players with his piano-wire rosary.

One of the PC's (rich mogul) had a hunting rifle and an occult tome with him that as part of his backstory he desperately wanted to keep. Nothing would stop the thing - bullets, meat hooks, etc. In the end, the ship was sinking, they pitched and made ready the last lifeboat, and escaped the sinking ship. The rich PC had smuggled the tome on the lifeboat, and the sea-horror tried to turn over the lifeboat to get at them. A struggling-match ensued as one of the other PCs tore the book from the millionaire's grasp and hurled it into the depths. Immediately, the creature stopped pursuing them and fled into the depths, leaving them to drift in the south atlantic near antarctica....
In my second year, I ran an AD&D game that was a continuation of an ongoing storyline. They had to sneak into Vecna's Demiplane on Ravenloft, and rescue an archmage from doom. You've never seen such sneaking from non-thieves in your life - but then, avoiding thousands of poison traps and level-draining undead will do that to you.

In they end, they stood near certain defeat, captured by Vecna's forces, when one of the PCs valiantly steps up, scores a critical, and cuts off Vecna's hand! Others used the confusion to free the archmage, and one even got bold enough to grapple vecna to keep him from casting spells - and succeeded in some ludicrous checks to dig out his eye! They fled through a portal created by the archmage, and promptly took his hand and eye to be buried in the heart of an active volcano. Fun, fun times...