"Obduction" and "Offworld Trading Company" are available for free on the Epic Games Store through July 23. If you've already added Offworld Trading Company to your Epic library, probably because the game was given away for free last year, Obduction is a newcomer and a good modern take on the Myst template. As always, adding it to your library this week will make it a permanent fixture.

Offworld Trading Company is a 2016 strategy game that reviewers describe as "a ruthless management sim that exploits people, prices, and planets. A story generator with a fairly steep difficulty level, it will definitely keep you busy until the next free drop arrives.Obduction is a first-person puzzle game and the spiritual successor to Myst. It's a nice evolution of that classic, removing the annoyances and adding some cool ideas.

Next week's free Epic Games Store game is "Defense Grid": the former is a detailed tower defense sim, the latter an authentic WWI first-person shooter. [The former is a detailed tower defense sim and the latter is an authentic World War I First Person Shooter. For more past and upcoming games, see the list of free games on the Epic Games Store.