Verdun and Defense Grid: The Awakening are free at Epic Games Store. The free game offers run until July 29 at 11 AM Eastern. Once you claim them, they’re yours to keep.
Verdun is “the first multiplayer FPS set in a realistic World War One setting and is the game which started the WW1 Game series. The vicious close-quarters nature of trench warfare means that skill with a bayonet can be as vital as good aim with a rifle.”
Defense Grid: The Awakening is described as “the ultimate tower defense game that appeals to players of all skill levels. A horde of enemies is invading, and it’s up to the player to stop them by strategically building defensive towers around their base.”