To entice gamers to its new storefront, Epic is offering a free copy of Unknown Worlds Entertainment’s Subnautica from now through December 27 on the Epic Games Store. The open-world title, which stars a character who crash lands on an underwater alien planet and must survive by crafting equipment and outsmarting various creatures, garnered an 87 Metacritic score and "Very Positive" reviews on Steam. You have crash-landed on an alien ocean world, and the only way to go is down. Descend into the depths of a vast underwater world filled with wonder and peril. Craft equipment, pilot submarines and out-smart wildlife to explore lush coral reefs, volcanoes, cave systems, and more - all while trying to survive.