" There is none. "
yes there is
in the game hold ctrl+shift+alt+G that opens up the in game cheat menu
Chat with our AI personalities
mode menu
No true cheat menu. You have to go under the tilde or ~ key with console commands and alter the code.
there is no cheat codes menu .
Press pause and then go to the options menu. They have many things there.
you hold insert on the keyboard and click main menu