Guide to registering your NS2 Steam ID
First you must register in the Tactical Gamer forums.
- Run Natural Selection 2.
- Press ~ to open the console. Note the Steam ID number as illustrated in the image below. It should be at the very bottom of the console window.
- Go to your Edit Profile page and scroll all the way to the bottom.
- Enter the Steam ID from step 2 in the 'Natural Selection 2 Player ID' field and click 'Save Changes'.
Now after a couple of map changes your Supporting Membership will let you join the full Tactical Gamer NS2 server!
Content mostly plagiarized from this classic post by dudewithagun