Developer/publisher Unknown Worlds Entertainment launched Subnautica 2 into Early Access yesterday, May 14, and in just 12 hours, the game surpassed 2 million copies sold. Subnautica 2 also reached 651,000 peak concurrent players across Steam, the Epic Games Store, and Xbox yesterday, making it clear that this highly anticipated underwater survival game is an Early Access hit. Subnautica 2 also has more than 12,500 reviews on Steam and maintains a “Very Positive” rating. Though Subnautica 2 still has a ways to…