The following are known CWCheat Codes for Gradius Collection on Sony Playstation Portable (PSP).

_S ULES-00381
_G Gradius Collection [EU]
_C0 Gradius   G - Infinite Live
_L 0x00792FC0 0x00000007
_C0 Gradius   I - Infinite Live
_L 0x00311662 0x00000007
_C0 Gradius  II - Infinite Live
_L 0x005BA5E0 0x00000007
_C0 Gradius  IV - Infinite Live
_L 0x0056AC90 0x00000007
_C0 Gradius III - Infinite Live
_L 0x00801050 0x00000007