Change movement speed
Note: This has to be done on the server machine. Now type sv_cheats 1 at the console, then type sv_friction <number>.

Weapon select
Note: This has to be done on the server machine. Now type sv_cheats 1 at the console. Also change the map with the changelevel <map name> console command. Then, type tf_weapon_<weapon name> at the console on any machine connected to the server to select that weapon.

Level select
Note: This has to be done on the server machine. Now type sv_cheats 1 at the console, then type changelevel <level name>.

See all monsters
Note:This has to be done on the server machine. Now type sv_cheats 1 at the console, then type mp_allowmonsters. Restart the level to view the monsters. Note: This can be done when your playing a map from another mod.

Change gravity
Note: This has to be done on the server machine. Now type sv_cheats 1 at the console, then type sv_gravity <-9999-9999>.

Weapon names
Use one of the entries below with the tf_weapon_ code.

Dead scout sliding on the ground
Switch your class to a scout. Go in the console, type +reload, then go underwater in a level. Then go in the console and type kill. Wait for someone to grab your pack, then you will become a zombie. To respawn again, go in the console and type -reload. Note: This trick has been removed in the latest versions.

Snipe farther
When your playing a sniper type fov 10 when your at the console to double your sniping vision.

Shoot with crowbar
Use these steps to use the crowbar to shoot bullets from the chaingun or flame from a pyro. Switch your class to an HW or Pyro. Then, use all your ammo from your chaingun or flamethrower. After you waste all the ammo, get out your crowbar and hold the Right Mouse Button or whatever shows your special ability menu and run over a pack of ammo. Then you should now be able to shoot with your crowbar.

Simply select the crowbar, then select the weapon you want to shoot. Now use all of the ammo and hold the button. While your holding it, press Q twice. While your still holding it, grab a pack of ammo. Now release the button and you will be able to shoot with your crowbar.

Keep same number of rounds after switching weapons
First start a multi-player game and grab the heavy weapons character. Now have your Gatlin Gun ready and be ready to switch your gun. Have the gun that you want ready then hold the Left Mouse Button for three seconds. You will now hear the gun rotate. The gun you selected will have the same ammo that the other gun had. This will also give you an extra 192 shots with the shotguns.