Today's free game on the Epic Games Store is an action RPG developed by Dontnod Entertainment called Vampyr. The game was initially launched in June 1028 on PS4 and Xbox One, and was later released on Switch in October 2019.
In Vampyr, players will assume the role of a newly-turned vampire named Dr. Jonathan Reid in London 1918. "As a doctor, you must find a cure to save the city’s flu-ravaged citizens. As a Vampyr, you are cursed to feed on those you vowed to heal. Will you embrace the monster within? Your actions will save or doom London," the synopsis reads.
Vampyr can be grabbed here.