From Team Fortress Wiki
Also included in this update: You being scared! [sound of bat wings] That's right, it's the Second Annual Team Fortress Halloween Special. Will there be ghosts? Quite possibly. Will there be exploding pumpkins? You never know. Will you wet your pants in terror? If you're anything like us, emphatically yes.
— TF2 Official Blog
The Scream Fortress Update, officially known as the Second Annu-Hell Scream Fortress Hauntdead Halloween Special, was the event launched with the October 27, 2010 Patch, which included the release of the two new Art Pass Contest-winning maps, new hats, new items, and new Ghostchievements as well as the reactivation of the 2009 Haunted Halloween Special's Scarechievements.
It was the 2010 equivalent of the 2009 Haunted Halloween Special, becoming the second Halloween event to be held within Team Fortress 2.
Although the Scream Fortress page on the TF2 Official Website stated that the event would only last until November 8, 2010, the Haunted Halloween Gift stopped spawning at Mann Manor, and Halloween-only hats ceased to be wearable at around November 8 at 8am GMT. However, Halloween-restricted items like the Spine-Chilling Skull, Voodoo Juju, and Noise Maker continued to be available at the Mann Co. Store throughout the day.
Horseless Headless Horsemann
The Horseless Headless Horsemann is a non-playable character boss, who attacks both RED and BLU teams until he is slain. The Horsemann, who is depicted as the undead apparition of Silas Mann, has a health range from 3000 to 9400, depending on the number of players in the server. The Horsemann does not spawn until ten or more players are present (not including spectators).
- Scream Fortress reintroduced the "Thriller" dance from Michael Jackson's Thriller as a taunt for all classes, originally introduced in the 2009 Haunted Hallowe'en Special. Taunting during the 2010 event would randomly chose between the standard weapon taunt and the Thriller taunt, even if no standard taunt existed for a weapon (for example, the Jarate). The taunt was turned off again at the conclusion of the event.
The Scream Fortress Update page
In-game notification of the end of the sale
Mann Family Portrait with Silas Mann hidden image