How to turn on developer mode in TF2

Type developer 1 in your game console to print developer messages on screen and in the console. 2 adds more detail and 0 turns it off.

developer

Sets the developer message level, which prints extra debug info to the screen and console.

developer <0|1|2>

Examples

developer 1

Show developer messages.

Arguments

levelRequired: 0 off, 1 or 2 for more output.

What it does

1 shows developer messages, 2 adds more detail. Turn it off for normal play.

The game's own description: Set developer message level

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.

Start a TF2 server All commands

From $0.03 an hour, only while it runs. New accounts get 6 free tokens.