Hmm, I had trouble finding official confirmation of that but did find a HN comment by scrollaway on this post who said they use “a proprietary http-based protocol called ngdp.” They also shared a document on the protocol and a commenter replied with a link to a deeper discussion of other ways to solve similar game patching distribution problems (amusingly, scrollaway also participated in that discussion).
they haven’t been using it for many years now
Hmm, I had trouble finding official confirmation of that but did find a HN comment by scrollaway on this post who said they use “a proprietary http-based protocol called ngdp.” They also shared a document on the protocol and a commenter replied with a link to a deeper discussion of other ways to solve similar game patching distribution problems (amusingly, scrollaway also participated in that discussion).