During LIVE mode press Left Trigger, Right Trigger, Up, X, Right Trigger to spawn the Cheat Gnome on different locations on all the islands. When you have then found a Cheat Gnome enter the following codes to unlock the corresponding effect in the game.
Unlock ALL Craft and Resources: Press Square, Triangle, Right Trigger, Down, Down, Up.
Unlock ALL Plans: Press X, Right Trigger, X, Right Trigger, X.
Max Current Food and Resources: Press Square 4 times, Left Trigger.
Gnome cheat: To activate gnome, press Left trigger, Right Trigger, Up, X, Right trigger. (the gnome IS in every area you just have to look for it)
Max Current Food and Resources: To activate press square 4 times followed by the Left Trigger. You can now go to your gnome and use this cheat.
All plans: To activate all plans press X, Right Trigger, X, Right Trigger, X. You can now go to your gnome press x go into gimme and get all plans.
All Craft and Resources: To Activate all Craft And Resources press Square, Triangle, Right Trigger, Down, Down, Up. You can now go to your gnome and press X, access gimme and use All Craft and Resources
All these cheats work so don't say they don't because I've used them