Developer

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Template:Entity It enables various levels of developer debugging options. This includes entity diagnostic information which will be printed to the console and also at the top of the screen.

Syntax: developer <value>

Valid values are:

• 0: No debugging information (standard behavior)
• 1: Standard debugging information (extra console messages, etc.)
• 2: More debugging information, messages can appear in the top-left of the player's HUD
• 3: Same as 2, but with more console messages
  Todo: Does this introduce any of the debugging stuff otherwise associated with 4?
• 4: Highest(?) level of debugging information; I/O events print to console, bounding boxes can show up on objects with VPhysics errors, etc.

developer 4 adds additional on-screen info like where the clients crosshair is pointing (not in HL2/Source 2013, shows the crosshair of all the players in multiplayer) and shows hitboxes and boundboxes when collision anomalies or errors occur.

Todo: Better details here!

Developer mode can also be enabled via the -dev or -developer command line switches, either as a shortcut or Steam command line. The Left 4 Dead series relies on this switch in order to load into developer mode.

See also

Other console commands and variables that a developer may find useful include:

• sv_cheats
• impulse

If you are looking for information about being a developer for Valve games, you may instead find these pages useful:

• Steam 3rd Party Mod Support