Epic Games Store is giving away two creepy games in time for Halloween - both Alan Wake's American Nightmare and Observer are available for free from October 17 to October 24. The horror games will replace Surviving Mars and its DLC as the free weekly content offered in the Epic Store.

Alan Wake's American Nightmare is a spin-off of the classic thriller Alan Wake. Much of the game is structured around an episode of Night Springs, an in-universe show that's an obvious homage to The Twilight Zone. Alan Wake's friend is asleep in a motel room while the show plays on the TV, and a narrator explains the action as it plays out. In the episode, Alan is trying to chase down his evil doppelganger, Mr. Scratch, but gets stuck in a time loop and must keep repeating his actions.

Observer is a cyberpunk horror game from Layers of Fear developer Bloober Team that stars Rutger Hauer (you know, the guy from Blade Runner). It's set in a futuristic Poland, where you play as Daniel Lazarski, a detective who can hack people's brain implants in order to interrogate them. When Daniel receives an unexpected call from his estranged son, a fragmented, trippy mystery lays itself out before you.

After that another Free Game Collection will take its place, offering Layers of Fear and Q.U.B.E. 2 at no charge