Green Man Gaming takes up to 90% off a selection of action and horror game downloads for Windows, Mac, and Linux during its Nightmare Sale. (You may need to sign in to see this sale.) Plus, coupon code "GMGSUM-MERSAL-E20OFF" cuts an extra 20% off. A couple of best bets, with prices after coupon:

• The Evil Within for PC for $12 (pictured, low by $28)
• Wolfenstein: The New Order for PC for $12 (low by $28)