In Burnville (the second map), when you have to go into the church to knock out the two machine gunners and the antiaircraft fire, do not go to the church. Instead, stay behind the big tomb with a cross on it and throw grenades over the wall to where the two machine gunners and antiaircraft guns would be (the corner of where the walls meet above it). Keep throwing them until someone says "Way to chuck, Private".

This trick will exploit a fatal error when applying the "+set developer 1 +set sv_cheats 1" command line parameter, if you get the "You cannot cheat on the server" message. After starting the game with that command line parameter, select a new game (or "Resume" a current game and the cheat should work). Set the level and start it. Then, save the game and exit out back to Windows. Restart the game and select "Resume". Do not manually select a game to load. All you need to do is "Resume" your current game.

Start the game with the "+set thereisacow 1337 +set developer 1 +set sv_cheats 1 +set monkeytoy 0" command line parameter. While playing the game, press ~ to display the console window. Enter one of the following codes at the console window to activate the corresponding cheat function. Repeat a code to disable its effect. Note: If the game responds "sv_cheats are read only", then type "setrandom sv_cheats 1" in the console before activating the codes. If the game responds that "cheats are not enabled on this server" then type "spdevmap [map name]" (for example, "burnville" or "dawnville") in the console before activating the codes.

Use one of the following values with the "map [map name]" code:

airfield
berlin
brecourt
burnville
carride
chateau
dam
dawnville
factory
hurtgen
pathfinder
pavlov
pegasusday
pegasusnight
powcamp
railyard
redsquare
rocket
sewer
ship
stalingrad
tankdrivecountry
tankdrivetown
trainstation
training
truckride