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

_S ULUS-10103
_G Gradius Collection [US]
_C0 GRADIUS 3: GAGE ?
_L 0x1080106A 0x00000006
_C0 GRADIUS 3: GAGE DOUBLE
_L 0x1080106A 0x00000001
_C0 GRADIUS 3: GAGE LASER
_L 0x1080106A 00x0000000
_C0 GRADIUS 3: GAGE MISSILE
_L 0x1080106A 0x00000002
_C0 GRADIUS 3: GAGE OPT
_L 0x1080106A 0x00000005
_C0 GRADIUS 3: GAGE SPEED
_L 0x1080106A 0x00000001
_C0 GRADIUS 4: GAGE ?
_L 0x10555682 0x00000006
_C0 GRADIUS 4: GAGE DOUBLE
_L 0x10555682 0x00000003
_C0 GRADIUS 4: GAGE LASER
_L 0x10555682 0x00000004
_C0 GRADIUS 4: GAGE MISSILE
_L 0x10555682 0x00000002
_C0 GRADIUS 4: GAGE OPT
_L 0x10555682 0x00000005
_C0 GRADIUS 4: GAGE SPEED
_L 0x10555682 0x00000001
_C0 GRADIUS G: GAGE ?
_L 0x1068F78A 0x00000006
_C0 GRADIUS G: GAGE DOUBLE
_L 0x1068F78A 0x00000003
_C0 GRADIUS G: GAGE LASER
_L 0x1068F78A 0x00000004
_C0 GRADIUS G: GAGE MISSILE
_L 0x1068F78A 0x00000002
_C0 GRADIUS G: GAGE OPT
_L 0x1068F78A 0x00000005
_C0 GRADIUS G: GAGE SPEED
_L 0x1068F78A 0x00000001
_C0 Inf. Shild - Gradius 1
_L 0x202FF448 0x00051C02
_C0 Infinite Lives Gradius 1
_L 0x002FF4F2 0x00000007
_C0 Infinite Lives Gradius 3
_L 0x005A7AA0 0x00000007
_C0 Infinite Lives Gradius 4
_L 0x00801050 0x00000007
_C0 Infinite Lives Gradius 5
_L 0x00555648 0x00000006
_C0 Infinite Lives Gradius G
_L 0x0068F780 0x00000007