One evening I was using /rcon to change maps (from my workstation) and various other commands to make changes on my server, when I hit esc key and noticed I had an extra menu command to "add bots". It gave me a full list of the NPC characters in the menu. Same as the bots list, listed in one of the threads. I exited my game then reentered the game. Entered my rcon password. Rconpassword worked but I was unable to get the Add bots menu back. I have no clue how I got the Add Bots menu. Anyone know how to get the Add Bots menu?

I've wondered that myself. I assumed originally it was only available from a non dedicated server/"Solo Game"

but I could be wrong.

I just use the addbot command anyway, especially since in Siege if you need to add a bot you'll never get the button in the menu.