The following are known CWCheat Codes for Clock Zero: Shuuen no Ichibyou Portable on Sony Playstation Portable (PSP).

_S ULJM-05944
_G Clock Zero: Shuuen no Ichibyou Portable (Limited Edition) [JP]
_C0 TOKUTEN OPEN
_L 0x814EB7D8 0x01000001
_L 0x00000001 0x00000000
_L 0x814F1935 0x009B0001
_L 0x00000001 0x00000000
_L 0x814F1A91 0x00060001
_L 0x00000001 0x00000000

_S ULJM-05945
_G Clock Zero: Shuuen no Ichibyou Portable [JP]
_C0 TOKUTEN OPEN
_L 0x814EB7D8 0x01000001
_L 0x00000001 0x00000000
_L 0x814F1935 0x009B0001
_L 0x00000001 0x00000000
_L 0x814F1A91 0x00060001
_L 0x00000001 0x00000000