Continuing its Halloween-inspired giveaways, the Epic Games Store has put on offer SOMA and Costume Quest to claim for free this week, replacing Layers of Fear and Q.U.B.E. 2.

SOMA is a sci-fi survival horror game developed by Frictional Games – the same team that developed Amnesia: The Dark Descent. Originally released in 2015, the story-heavy title takes players on a journey full of mystery, with the gameplay focused on stealth and puzzle solving. Here’s how the Epic Games Store describes the title:

The radio is dead, food is running out, and the machines have started to think they are people. Underwater facility PATHOS-II has suffered intolerable isolation and you’re going to have to make some tough decisions. What makes sense? What is left to fight for?

Costume Quest is a Halloween-themed adventure RPG by Double Fine Productions. A game full of humor, it takes players on a trick-or-treat adventure around three environments, all the while completing quests and building their party. Here’s how the Epic Games Store describes the title:

Costume Quest is a Halloween adventure from Tim Schafer's Double Fine Productions. In this charming role-playing game, choose your hero and trick-or-treat through three beautiful environments full of Double Fine humor and story.

Epic Games Store is offering SOMA for Windows and macOS, and Costume Quest for Windows, at no cost to players. It’s worth noting, however, that the former is available for macOS and both titles are also available for Linux via Steam, where they are priced $4.49 and $2.49 respectively, on account of the ongoing Halloween sale. Here are the minimum requirements for the games:

Costume Quest SOMA Windows OS: Windows XP SP3

Windows XP SP3 Processor: 1.4 GHz dual core CPU

1.4 GHz dual core CPU Memory: 1 GB RAM

1 GB RAM Graphics: 256 MB GeForce 7600GS, Radeon X1600, or Intel HD Graphics

256 MB GeForce 7600GS, Radeon X1600, or Intel HD Graphics Storage: 1.0 GB free hard drive space Windows OS: 64-bit Windows Vista

64-bit Windows Vista CPU: Core i3 / AMD A6 2.4Ghz

Core i3 / AMD A6 2.4Ghz Memory: 4 GB RAM

4 GB RAM GPU: NVIDIA GeForce GTX 260 / AMD Radeon HD 5750. OpenGL 3.3

NVIDIA GeForce GTX 260 / AMD Radeon HD 5750. OpenGL 3.3 Storage: 25 GB macOS OS: 64-bit macOS 10.9

64-bit macOS 10.9 CPU: Core i3 2.4Ghz

Core i3 2.4Ghz Memory: 4 GB RAM

4 GB RAM GPU: NVIDIA GeForce GTX 260 / AMD Radeon HD 5750. OpenGL 3.3

NVIDIA GeForce GTX 260 / AMD Radeon HD 5750. OpenGL 3.3 Storage: 25 GB

If you wish to claim SOMA or Costume Quest, you can find them here. They will be free to claim until November 7, which is when Epic will put on offer Nuclear Throne and Ruiner for its next giveaway.