Go to the mailbox and enter L1,R1,up,x,R2. A green crystal will appear. Now you can activate the other cheats:
Activation cheats
Six hours later: o, square, L1, up, down
Motives/Needs: high,o,high,right,L2
9999 Simelons:R1,L1,R2
Skills: triangle, o, square, R2, left
All objects:L2,o,down,left,up
All plots:o,L2,left,o,up,o
Garments: square, R2, bottom, right, square
All recipes :L1,R1,up,x,R2
When you pause the game hold L2 + R2 then enter the following cheats:
X,X,O,O,high,triangle = 999.99 simelins.
O,O,O,O,O,L1,R2,=All objects cost 0 simelions,
L2,O,O,X,=Infinite building ground.