https://www.pcgamer.com/the-latest-epic-games-store-exclusive-is-a-horror-adventure-with-tesla/

Art Deco adventure Close to the Sun is the latest game to appear exclusively on the Epic Games Store. It's a first-person horror romp that looks quite a bit like BioShock but contains no combat. You'll be stuck on a boat with Nikola Tesla, and bad news: he's a dick. 

Developer Storm in a Teacup previously received an Unreal developer grant before it found a publisher, but before that it was using Unity. Epic's surely considering it a double win, then, with the game using both its engine and store.