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Re:The DOOM 3 Network Architecture (2006) [pdf] by kyrra on Saturday July 09, 2016 @08:51PM (#12064064)
Dota2 interestingly enough just uses protobufs for network and replays I believe.

https://github.com/skadistats/smoke/wiki/Anatomy-of-a-Dota-2...

Re:The DOOM 3 Network Architecture (2006) [pdf] by sluukkonen on Sunday July 10, 2016 @06:03AM (#12065121)
CSGO does as well.