/SLASHPLAY
How to play a map offline in TF2
Type map ctf_2fort in your game console to start a local server on 2Fort. On a dedicated server it loads the map fresh.
map
Starts a map, loading it fresh. Also used to start a local server from your own game.
map <map> Examples
map ctf_2fort Start 2Fort.
map tr_walkway_rc2 Load Walkway for bot practice.
Arguments
mapRequired- Map name without .bsp.
What it does
Loads the given map and starts a new server session on it. On a running dedicated server, changelevel is usually preferred because it keeps players connected. In your own game client, map starts a local listen server, which is the quickest way to try a map or practice offline.
The game's own description: Start playing on specified map.
Run it on your server
On a SLASHPLAY server, type it in the Console tab of the server page; the reply shows right under it. A value set there lasts until the server restarts. To keep it, add the line to tf/cfg/server.cfg. New to this? Start a TF2 server first.
Your own
TF2 server.
From $0.03 an hour, only while it runs. New accounts get 6 free tokens.