Your 'Unique ID' is required when you play in an Enemy Down ladder. Some games do not require Unique ID's, please check your game's specific rules for details. For Half-Life mods (CS and DOD) the Unique ID is known as your 'Steam ID' previously your 'Won ID'.

To find your Steam ID, simply join any internet server, open your console by pressing the ` key (top left of keyboard) and type "status".

Your Steam ID is the bit after "STEAM_". In this example, Spike's Steam ID is 0:0:82305.

If you are playing Call of Duty, you will need to find your Punkbuster ID. This is easily found by opening your console (` key at top left of keyboard) and then typing "/pb my_guid". Your ID will be a 32 character mix of letters and numbers.