On the halloween, its certain you will do something before hanging out.
How about hooking up some scary shit? Here is my suggestions.

• Painkiller: Heaven's got a hitman
• Painkiller: BOH
• MediEvil
• MediEvil 2
• Penumbra: Black Plague
• Demon's Crest
• Blood 2 The chosen

Most of these games may not be suitable for your PC, because most of them are really outdated, especially Blood 2.

Suggestions wellcome.