Generally, if the player is not aware of what they are doing, they should not do it. Console enabler mods in any games are also very likely to result in a ban. Editing the configuration files ('config.cfg' and 'config_mp.cfg') in Call of Duty: Modern Warfare 2, Call of Duty: Black Ops and Call of Duty: Modern Warfare 3 is safe and cannot lead to a VAC ban, although in the later games the corresponding files are encrypted and are not considered safe to edit. Note: While activating the console in games until Call of Duty: World at War is rather simply done completely in-game, starting with Call of Duty: Modern Warfare 2, the game files have to be altered.
Since Call of Duty uses the same base for most of its game engines, many commands remain the same throughout the series. The console can be used for testing and to give information useful to the developers of the game, generally for debugging, hence the term 'developer console'. The console can be used to significantly alter the game, including but not limited to making the player invincible, obtaining a weapon that would normally be impossible to get, free-flying, changing game rules and more. Developer console is a tool available on video games, which is usually accessed by pressing the tilde (~) or grave key (`) key (the key may be different for keyboards with different language set-up it is usually the key to the left of 1).
