Gabe Newell, the billionaire founder of Valve and Steam, has acquired a sprawling waterfront estate in Manalapan, Florida for $70.8 million, marking a rare foray into land-based real estate for a man who has spent recent years living primarily at sea.
The roughly 20,000-square-foot property, which Newell purchased from mechanical subcontracting founders Cindy and Ron McMackin, comes with an unusual feature: a private tunnel that connects directly to the beach and ocean. The McMackins had paid $39 million for the home in 2020.
Beyond the tunnel, the estate includes an eight-car garage, wine cellar, guest quarters, wellness wing, outdoor pool, dock, and boat lift. The home's most distinctive element,the subterranean passage to the water,was showcased in a 2020 promotional video by the listing agent.
While Valve remains privately held and does not disclose financial details publicly, Newell's net worth is estimated at roughly $11 billion, built on the foundation of creating Half-Life, Counter-Strike, and Dota, along with establishing Steam as the dominant digital storefront for PC gaming. Every game sold on the platform generates revenue for Valve.
For the past several years, Newell has opted for a maritime lifestyle, maintaining a fleet of luxury yachts anchored in various locations rather than settling near Valve's headquarters in Bellevue, Washington. His flagship vessel, the Leviathan, features an onboard hospital, laboratory, spa, and gaming installations.
In a July interview with YouTuber Zalkar Saliev, the 63-year-old Newell offered rare commentary on his unconventional work arrangements. He described a daily routine of waking, working from his superyacht bedroom, diving, exercising, and collaborating with colleagues on artificial intelligence projects, Steam infrastructure, and other ventures including an aerosol pathogen detection device and brain-computer interface research.
Newell emphasized that his work schedule, which spans seven days a week, does not feel like labor. "I like working. It's fun," he told Saliev. "The kinds of things that I get to do every day are super awesome. It's more like I can't go to sleep because I'm having fun."
His various interests extend well beyond gaming software. Newell has purchased a shipyard and founded Inkfish, a research organization focused on ocean science. Most notably, he is currently funding the construction of a $230 million deep-sea research vessel designed to carry robotic systems, scientific laboratories, and a team of 70 researchers to map the deepest oceanic trenches by 2028.
The purchase of a substantial land property,complete with that underground ocean passage,suggests Newell intends to divide his time between maritime and terrestrial bases. Whether the new mansion will influence Valve's development roadmap or accelerate work on any long-dormant franchises remains to be seen.
Author Emily Chen: "A man who's spent years on superyachts with tunnels to the ocean definitely gets billionaire priorities, but buying a $70 million mansion with its own underwater passage is peak Gabe Newell."
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