+set developer +set ui_console 1 +set cheats 1 +set thereisnomonkey 1 +set cl_playintro 0
Put that in target field. You can change +set cl_playintro 0 to +set cl_playintro 1 if you want the introduction sequence in the console in the game.
The cheats do not work in versions 1.1 and higher so if you installed a patch thats the problem.