At public beta launch, Lumberyard already has components that are not based on CryEngine. Aside from adding the AWS SDK to the engine – allowing for native C++ access to its services – Amazon has also brought in new low-latency networking code based on what Double Helix, the Southern California studio it acquired in 2014, developed for Xbox One fighting game Killer Instinct.
http://gamasutra.com/view/news/265425/ [gamasutra.com]