Time: Oct. 29 8:00 – 12:00
Game: Guild Wars
Place: Tyria
Content: Halloween has come to Tyria, and that means the return of Mad King Thorn, new holiday quests, loads of creepy items, the Costume Brawl PvP event, and more!

http://www.guildwars.com/events/ingame/halloween_2009/

Time: Oct. 29 14:00 – 18:00
Game: AION
Place: Atreia
Content: Experience the exhilaration of the hunt, and log in and play Harvest Revel. Join roving Dark Night bands to hunt and destroy the undead before they invade Elyos villages.

http://powerwiki.uk.aiononline.com/aion/Harvest+Revel

Time: Oct. 30 8:00 – 18:00
Game: Dragonica
Place: El Grego, Faeras
Content: Today is An excellent day. In the morning we defeat monsters leaded by The Prince of Darkness, and then we upload our screenshots for Halloween Heroics Photo-Journal Contest.

http://dragonica.iahgames.com/news/NewsArticle.aspx?id=214&groupName=Events#halloween

Time: Oct. 31 8:00 – 12:00
Game: World of Warcraft
Place: Azeroth
Content: Halloween turns to Azeroth. Headless Horseman has come with cutu Baby Pumpkin, sharp sword and rare Headless Horseman Mount! Let’s Go and Rob him! (Headless Horseman: Who is the leading ROLE?)

http://www.worldofwacraft.com/

Time: Oct. 31 14:00 – 18:00
Game: Runes of Magic
Place: Taborea
Content: New Wings And New contest. Do You Love Halloween？If you do, take the photos and participate the photo contest for various prizes.

http://us.runesofmagic.com/us/news,id436,halloween_celebration_taborea.html

Time: Nov 1 8:00 – 18:00
Game: Maple Story
Place: Maple World
Content: Dressed up your own Halloween Theme Costume and enter the mysterious mansion to discover the woeful story of Toymaker

http://en.maplestory.nexoneu.com/Maple.aspx?Part=/News/Event