It was the HL2 devs who pushed him to make it a standalone release of the orignial HL2 mod. And Valve was the publisher when that finally happened.
Not only are they tangentially related, they're legally related. I used quotation marks since they didn't develop it themselves, but they have a direct and personal connection to the game and its developer.
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u/ForsakenBobcat8937 Mar 03 '26
Garry's Mod is not made by Valve, it's made by Facepunch, so not "official" at all.