Mothergunship and Train Sim World 2 are free at Epic Games Store. The free game offers run until August 5 at 11 AM Eastern. Once you claim them, they’re yours to keep.
Mothergunship comes from Versus Evil and Terrible Posture Games. It is described as a “bullet-hell FPS where you craft your own guns, fight huge bosses, and defeat a robotic alien armada that conquered Earth.”
Train Sim World 2 is described as “the evolution of train simulation. Master iconic locomotives on high-speed services, long freight hauls, or precise commuter traffic, and get creative with customization tools in this advanced sequel.”