Valve's Gabe Newell continues spending his billions on an undersea armada, adding an $800 million deep sea vessel to the one he already had in the works

Steam and Valve's Gabe Newell.

There's a relatively high chance Valve co-founder Gabe Newell and Hollywood director James Cameron are at least friendly. How do I know? They both partake in the hilariously ridiculous rich person hobby of investing in submarines.

One of the central figures behind Half-Life and Steam, Newell is already a relatively big player in ocean exploration, since he owns Inkfish, a research firm dedicated to learning about the ocean depths. He footed the bill on a new vessel known as RV6000, a 100-meter-sized project that recently started construction at a shipyard in Romania, and now he's taking his investment even further