Protocol Specifications

Documentation about the game server protocols is scattered across the Internet.

Servers

Battlefield: Bad Company 2

• Specification
• Clarification on Blog

GameSpy

• Specification

Battlefield 1942

• Battlefield 1942

Unreal Engine 1

• UT Server Query

Unreal Engine 2

• Unreal Engine 2 Specification

Valve

• Server queries

Server Lists

• Master Server Query Protocol