Team Fortress 2 is celebrating its fifth annual Halloween special, also known as Scream Fortress, with the release of an all new thing called Helltower.
What is it? It's "magic-blasted, skeleton-infested terrorscape" in which two teams mush push a corpse-filled cart to reach the infernal maw of a gaping Hellmouth in a Payload Race of doom. Valve even made a comic called Grave Matters to celebrate the map's release.
In addition to the Helltower map, there's Spell Books, which we have no idea what they do, and over 100 new items for you to bedeck your character in. Good times.