Ip list of known gaming/download servers?

[dragon2611]

Does anyone know a good list of known gaming/download servers I could load into Opnsense.

I want to load balance steam/origin.etc downloads across both my WAN's but I can't just do it by Port as Steam now uses HTTP for downloads and I don't want to balance all web traffic as then I get the headaches associated with Ip's changing.etc

Or any other way to do it  ???