From Press Release:
The nights are getting darker, as is Fellowship, Arc Games and Chief Rebel’s beloved multiplayer online dungeon adventure. In the spirit of the spooky season and following the title’s recent successful Early Access launch that had all the MMO, MOBA and ARPG fans howling, Fellowship is hosting its first-ever in-game Halloween event, The Haunting of Stronghold, and it’s available now until November 13!
Check out the dev blog and assets for more details below… if you dare:

Starting today, October 30, until November 13, the Stronghold will transform into a haunted wonderland. During this time, the Stronghold will offer time-exclusive hauntingly beautiful hero cosmetics, spooky new visual elements, an otherworldly remix of the music track in the Stronghold and new ghoulish audio elements to haunt your eardrums, and the Caretaker of Fallen Heroes vendor to give you plenty of treats (cosmetics and mounts!) for all the tricks you’re able to achieve.
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