Spy vs. Spy
Enter the "Extras" menu and select the "Cheat" option. Enter "ARMOR" as a code. If you entered the code correctly, a message will appear.
Enter the "Extras" menu and select the "Cheat" option. Enter "WRKBENCH" as a code. If you entered the code correctly, a message will appear.
Enter the "Extras" menu and select the "Cheat" option. Enter "BIGGUNZ" as a code. If you entered the code correctly, a message will appear.
Enter the "Extras" menu and select the "Cheat" option. Enter "FAIRY" as a code. If you entered the code correctly, a message will appear.
Enter the "Extras" menu and select the "Cheat" option. Enter "NODROP" as a code. If you entered the code correctly, a message will appear.
Enter the "Extras" menu and select the "Cheat" option. Enter "PROHIAS" as a code to unlock all Single Player Modern mode levels. If you entered the code correctly, a message will appear.
Enter the "Extras" menu and select the "Cheat" option. Enter "ANTONIO" as a code to unlock all Story mode levels. If you entered the code correctly, a message will appear.
Enter the "Extras" menu and select the "Cheat" option. Enter "MADMAG" as a code to unlock all multi-player levels. If you entered the code correctly, a message will appear.
Enter the "Extras" menu and select the "Cheat" option. Enter "DISGUISE" as a code to unlock all Spy attachments. If you entered the code correctly, a message will appear.
Enter the "Extras" menu and select the "Cheat" option. Enter "SPYFLIX" as a code to unlock all FMV sequences. If you entered the code correctly, a message will appear.
Enter the "Extras" menu and select the "Cheat" option. Enter "SPYPICS" as a code to unlock all concept art. If you entered the code correctly, a message will appear.
Successfully complete all levels in Single Player Modern mode to unlock the Timed levels.
For each Timed Level that is completed, you will unlock the concept art for that level.
Successfully complete the Mansion level in story mode to unlock the Aristocrat costume.
Successfully complete the Kooky Carnival level in story mode to unlock the Clown costume.
Successfully complete the Space Ship level in story mode to unlock the Flight Suit costume.
Successfully complete the Volcano Lair level in story mode to unlock the General costume.
Successfully complete the Space Ship level in story mode to unlock the Samurai costume.
Successfully complete Area 51 level in story mode to unlock the Soldier costume.
Successfully complete the Robot Factory level in story mode to unlock the Spy-Bot costume.
Successfully complete the Oil Rig level in story mode to unlock the Worker costume.
Successfully complete the Haunted House level in story mode to unlock the Zombie costume.
Play the Haunted House level. In the room with the levitating furniture, the last book is Cheato from Banjo-Tooie.