MCCP (Mud Client Compression Protocol)
MCCP is a protocol for sending compressed data from the server to the client. It can greatly reduce the outgoing bandwidth from the mud, and may also decrease client latency. You can read more about it here.
Of the 116 active characters on God Wars II, 77 use MCCP, and of those only 40 last connected from a unique IP address. Of those 40, 1 refused to identify their client. The remaining 39 characters are broken down by client as follows: