Cheat Gnome, During Gameplay Press R1,L1,Down,[],R2,

Max All Motives, During Gameplay Press R2,Up,X,[],L1,

Max Current Inventory, During Gameplay Press Left,Right,[],R2,[],

Max Relationships, During Gameplay Press L1,Up,R2,Left,/,

All Resources, During Gameplay Press [],/,Down,X,Left,

Add 1 To Skill, During Gameplay Press /,L1,L1,Left,/

All Crafting Plans, During Gameplay Press X,/,L2,[],R1

The Cheats Above Work I Used These Cheats Alot

Cheat Gnome (Use the Cheat Gnome to use codes).
R1, L1, Down, Square, R2

Refill motives
R2, Up, X, Square, L1.

All plans
X, Triangle, L2, Square, R1.

All crafting resources
Square, Triangle, Down, X, Left.

Nine Hundred and Ninety Nine of All current food and resources
Left, Right, Square, R2, Square.

One Hundred of all food and resources in your inventory
L1, Up, R2, Left, Triangle.

Add one to any skill (Well worth it)
Triangle, L1(2), Left, Triangle.

You can find the entrance to the 4th Island on the second Island, you don't take the boat, you swim to it, hope this helps.

Cheats knome=r1,li,down,square,r2

Max current inventory=left,right,square,r2,square

Max relationships=l1,up,r2,left,square

Give all resoures=square,triangle down,x,left

Give all plans=x,triangle,l2,square,r1

Set skills=triangle,l1,l1,left,triangle