Valve co-founder and billionaire Gabe Newell has purchased a massive, 20,000-square-foot estate in Manalapan, Florida, for $70.8 million. The luxury property features high-end amenities like a wine cellar, a wellness wing, and—most notably—an underground tunnel that connects the residence directly to the ocean.

While Newell has spent recent years living and working primarily from his fleet of superyachts, this high-profile land acquisition marks a rare real estate move for the gaming mogul. Despite the internet’s inevitable speculation, the purchase has no bearing on the status of Half-Life 3.