NCsoft is celebrating Halloween in Aion, Lineage II, City of Heroes and Guild Wars. Here's the schedule:

• Aion's Harvest Revel.Oct. 26 to Nov. 9. This year the Harvest Revel stars the witches of Sanctum and Pandaemonium, tasking you with harvesting souls. Reward bundles for these quests include Sugarcrook’s Sack, Witch’s Sack, Witch’s Hoard, Witch’s Surprise and more. Each bundle contains a number of possible prizes – including Halloween costumes, scrolls, amulets and Harvest Ale.
• Lineage II's Halloween Treats. Begins Oct. 26. Your highest level character per server, per account will receive a Halloween Hat, a Halloween Gift Box and a Golden Jack O’Lantern Mask 7-Day Pack.
• City of Heroes – Dr. Kane’s House of Horror. Through Nov. 2. This event will add even more panache to the existing Zombie Apocalypse and Deadly Apocalypse, as you venture into a nightmarish mansion full of danger. Take on the doctor’s zombie horde as you make your way through this terrifying house of horror. Will you be able to stop the doctor from creating a zombie army?
• Guild Wars – The Mad King Thorn. Through Nov. 2. Once a year, Mad King Thorn and his spooky cohort visit the land of mortals for a creepy celebration full of holiday quests, the Costume Brawl PvP event, Halloween-themed guild vs. guild battles, two new costumes, and lots of other tricks and treats.