The Steam Halloween Sale is a new promotion which includes games fit for the Halloween theme, which will last until November 3rd. Tens of titles for Linux are included as well, and come at discounts as high as 90%.
The Linux “spooky” titles in this sale is around 100, and they all benefit from discounts that go up to 90%. Some of the notable games included are Left 4 Dead 2, Killing Floor, The Witcher 2, Don’t Starve, Amnesia, Penumbra, Postal 2, System Shock 2, Painkiller: Hell & Damnation. All the titles can be found here.
Painkiller: Hell & Damnation Collection (2012) is available for 2,99€, with a 90% discount from 29,99€ (On Steam). You can also buy games in this collection individually for the same discount.
Amnesia: A Machine for Pigs (2013) is available for 4,37€, with a 75% discount from 17,49€ (On Steam).
Left 4 Dead 2 (2009) is available for 3,49€, with a 75% discount from 13,99€ (On Steam).
Deadly 30 (2014) is a retro-style 2D, side-scrolling survival horror game:
The promotion ends November 3rd.