References

Protocol	Url
A2S Source Query Protocol	http://developer.valvesoftware.com/wiki/Server_Queries
SQP Unity Query Protocol	https://docs.unity.com/ugs/en-us/manual/game-server-hosting/includes/sqp
Unreal Tournament 3	http://wiki.unrealadmin.org/UT3_query_protocol
Cryosphere	http://flstat.cryosphere.co.uk/global-list.php
rFactor	http://users.pandora.be/viperius/mUtil/
Tribes 2	http://www.tribesmasterserver.com , http://www.tribesnext.com
Cube	http://cubelister.sourceforge.net
Americas Army 3	http://aluigi.altervista.org/papers.htm#aa3authdec
Doom (Zandronum)	https://wiki.zandronum.com/Launcher_protocol , http://en.wikipedia.org/wiki/Huffman_coding
CS2D	http://www.cs2d.com/servers.php
Titanfall 2	https://github.com/R2Northstar/NorthstarLauncher/blob/main/primedev/masterserver/masterserver.cpp
Minecraft	https://wiki.vg/Query
RakNet Protocol Minecraft Bedrock	https://wiki.bedrock.dev/servers/raknet-and-mcpe.html , https://wiki.vg/Raknet_Protocol
SAMP	https://sampwiki.blast.hk/wiki/Query
Teeworlds	https://chillerdragon.github.io/teeworlds-protocol/07.html

Some protocols & examples: https://int64.org/docs/gamestat-protocols/