This week's giveaway at the Epic Games Store brings Obduction and Offworld Trading Company. They are both sci-fi titles; the former is a first-person puzzle adventure, while the latter is an RTS.
Obduction RSS
GOG has decided to take the wraps off of its Summer Sale Festival, which coincides with the arrival of DRM-free BioShock Infinite Complete Collection. Obduction is free to claim for 48 hours.