Enable cheats:
Hold down L1 + R1 + TRIANGLE + DOWN for 3 seconds.

+100 Gold:
L1, R1, R1, R1, R1, L1, TRIANGLE, L1, L1, L1. 

+100 Souls:
R1, L1, L1, L1, L1, R1, TRIANGLE, R1, R1, R1. 

+1000 Gold and Souls:
R1, R1, L1, R1, R1, TRIANGLE, TRIANGLE, TRIANGLE, L1, L1. 

Disable Fog of War:
R1, L1, R1, R1, L1, L1, TRIANGLE, TRIANGLE, L1, R1. 

God Mode:
R1, R1, R1, L1, L1, L1, R1, L1, TRIANGLE, R1. 

Level Select:
TRIANGLE, TRIANGLE, TRIANGLE, L1, R1, L1, L1, R1, L1, R1, R1, L1, R1, L1, L1, R1, L1, R1, L1, L1, R1, L1, L1, R1, L1, R1, R1, TRIANGLE, TRIANGLE, TRIANGLE. 

Slow Down:
L1, L1, L1, L1, L1,TRIANGLE, TRIANGLE, TRIANGLE, TRIANGLE, R1. 

Speed Up:
R1, R1, R1, R1, R1, L1, TRIANGLE, R1, R1, R1. 

Win Level:
R1, R1, L1, L1, L1, R1, R1, TRIANGLE, TRIANGLE, TRIANGLE.