The following are known CWCheat Codes for Metal Gear Solid: Portable Ops on Sony Playstation Portable (PSP).

_S ULUS-10202
_G Metal Gear Solid: Portable Ops [US]
_C0 All and infinite objects and weapons and ammo in i
_L 0x8022442E 0x004E0001
_L 0x1000270F 0x00000000
_C0 animation freeze game sharing
_L 0x0120C1D8 0x00000000
_C0 Bottom Item: Infinite Items/Ammo
_L 0x11358BDC 0x0000270F
_C0 Bottom Item: Max Items/Ammo
_L 0x11358BE0 0x0000270F
_C0 Character Modifier : Ski Mask Soldier with Jungle
_L 0x0021CA48 0x0000002D
_C0 Equip Claymore
_L 0x0021CA90 0x0000001C
_C0 Equip Stealth Camo
_L 0x1021CA92 0x00004014
_C0 fast running game sharing
_L 0x0121151E 0x00000000
_C0 funky camera
_L 0x00208302 0x000003E7
_C0 Get 9999 of all weapons, items and ammo in your re
_L 0x1022442E 0x0000270F
_L 0x10224430 0x0000270F
_L 0x10224432 0x0000270F
_C0 inf ammo and no reload mk22
_L 0x11358B84 0x00000028
_L 0x1021CA40 0x00000009
_L 0x11358B8C 0x00000009
_C0 inf hp stamina game sharing
_L 0x01211FE0 0x00000064
_L 0x012A9B40 0x00000064
_L 0x01211FE5 0x00000226
_C0 Inf.Stamina
_L 0x2021CC08 0x00018670
_C0 Inf.Stamina
_L 0x2021CB80 0x00018670
_C0 Inf.Stamina
_L 0x2021CAF8 0x00018670
_C0 Infinite Health
_L 0x10251790 0x0000012C
_C0 Infinite Health
_L 0x20251790 0x00FF00FF
_C0 Infinite Health
_L 0x20251790 0x00FF00FF
_C0 Infinite Health
_L 0x00251790 0x000000FF
_C0 Infinite Health
_L 0x18A51790 0x0000012C
_C0 Infinite Hp
_L 0x1021CC00 0x000003E7
_C0 Infinite Items/Ammo
_L 0x19B58BB0 0x0000270F
_C0 Infinite Life Snake
_L 00251790 0x22000200
_C0 Infinite Stamina
_L 0x00251795 0x000000F8
_C0 Left Item: Infinite Items/Ammo
_L 0x11358C08 0x0000270F
_C0 Left Item: Max Items/Ammo
_L 0x11358C0C 0x0000270F
_C0 Lots of Health Kits(L)
_L 0x10224474 0x000003E7
_C0 Lots of MK22
_L 0x10224432 0x000003E7
_C0 Lots of Rations(L)
_L 0x10224478 0x000003E7
_C0 M1911A1 (x9999)
_L 0x00224434 0x000270F
_C0 M37 (x9999)
_L 0x00224442 0x000270F
_C0 M63 (x9999)
_L 0x00224446 0x000270F
_C0 M870 (x9999)
_L 0x00224444 0x000270F
_C0 make a time paradox report
_L 0x10224426 0x0000270F
_L 0x10224428 0x0000270F
_L 0x1022442A 0x0000270F
_C0 Max Health
_L 0x10251792 0x0000012C
_C0 Max Health
_L 0x18A51792 0x0000012C
_C0 Max Items/Ammo
_L 0x19B58B88 0x0000270F
_C0 Max Items/Ammo
_L 0x19B58BE0 0x0000270F
_C0 Max Items/Ammo
_L 0x19B58C0C 0x0000270F
_C0 Max Items/Ammo
_L 0x19B58BB4 0x0000270F
_C0 MK22 (x9999)
_L 0x00224432 0x000270F
_C0 MK22 Ammo
_L 0x102244A6 0x0000270F
_C0 Right Item: Infinite Items/Ammo
_L 0x11358BB0 0x0000270F
_C0 Right Item: Max Items/Ammo
_L 0x11358BB4 0x0000270F
_C0 RPG-7 (x9999)
_L 0x0022444C 0x000270F
_C0 SAA (x9999)
_L 0x00224436 0x000270F
_C0 score modifier game sharing 
_L 0x0024736C 0x00001000
_L 0x002473A8 0x00001000
_L 0x0024755C 0x00001000
_C0 Skill Rank S A.Rifle SK
_L 0x0021CC1E 0x00000003
_C0 Skill Rank S A.Rifle SK
_L 0x0021CB96 0x00000003
_C0 Skill Rank S A.Rifle SK
_L 0x0021CB0E 0x00000003
_C0 Skill Rank S Handgun SK
_L 0x0021CC1C 0x00000003
_C0 Skill Rank S Handgun SK
_L 0x0021CB94 0x00000003
_C0 Skill Rank S Handgun SK
_L 0x0021CB0C 0x00000003
_C0 Skill Rank S Shotgun SK
_L 0x0021CC1F 0x00000003
_C0 Skill Rank S Shotgun SK
_L 0x0021CB97 0x00000003
_C0 Skill Rank S Shotgun SK
_L 0x0021CB0F 0x00000003
_C0 Skill Rank S SniperR SK
_L 0x0021CC20 0x00000003
_C0 Skill Rank S SniperR SK
_L 0x0021CB98 0x00000003
_C0 Skill Rank S SniperR SK
_L 0x0021CB10 0x00000003
_C0 Skill Rank S Sub.Mac SK
_L 0x0021CC1D 0x00000003
_C0 Skill Rank S Sub.Mac SK
_L 0x0021CB95 0x00000003
_C0 Skill Rank S Sub.Mac SK
_L 0x0021CB0D 0x00000003
_C0 Skill Rank S(Snake)A.Rifle SK
_L 0x0021CA86 0x00000003
_C0 Skill Rank S(Snake)Handgun SK
_L 0x0021CA84 0x00000003
_C0 Skill Rank S(Snake)Shotgun SK
_L 0x0021CA87 0x00000003
_C0 Skill Rank S(Snake)SniperR SK
_L 0x0021CA88 0x00000003
_C0 Skill Rank S(Snake)Sub.Mac SK
_L 0x0021CA85 0x00000003
_C0 SkillRank S HeavyWep SK
_L 0x0021CC21 0x00000003
_C0 SkillRank S HeavyWep SK
_L 0x0021CB99 0x00000003
_C0 SkillRank S HeavyWep SK
_L 0x0021CB11 0x00000003
_C0 SkillRank S Knife SK
_L 0x0021CC22 0x00000003
_C0 SkillRank S Knife SK
_L 0x0021CB9A 0x00000003
_C0 SkillRank S Knife SK
_L 0x0021CB12 0x00000003
_C0 SkillRank S Medical SK
_L 0x0021CC26 0x00000003
_C0 SkillRank S Medical SK
_L 0x0021CB9E 0x00000003
_C0 SkillRank S Medical SK
_L 0x0021CB16 0x00000003
_C0 SkillRank S Tech SK
_L 0x0021CC25 0x00000003
_C0 SkillRank S Tech SK
_L 0x0021CB9D 0x00000003
_C0 SkillRank S Tech SK
_L 0x0021CB15 0x00000003
_C0 SkillRank S ThrowWep SK
_L 0x0021CC23 0x00000003
_C0 SkillRank S ThrowWep SK
_L 0x0021CB9B 0x00000003
_C0 SkillRank S ThrowWep SK
_L 00021CB13 0x00000003
_C0 SkillRank S Trap SK
_L 0x0021CC24 0x00000003
_C0 SkillRank S Trap SK
_L 0x0021CB9C 0x00000003
_C0 SkillRank S Trap SK
_L 0x0021CB14 0x00000003
_C0 SkillRank S(Snake)HeavyWep SK
_L 0x0021CA89 0x00000003
_C0 SkillRank S(Snake)Knife SK
_L 0x0021CA8A 0x00000003
_C0 SkillRank S(Snake)Medical SK
_L 0x0021CA8E 0x00000003
_C0 SkillRank S(Snake)Tech SK
_L 0x0021CA8D 0x00000003
_C0 SkillRank S(Snake)ThrowWep SK
_L 0x0021CA8B 0x00000003
_C0 SkillRank S(Snake)Trap SK
_L 0x0021CA8C 0x00000003
_C0 SLOT 01 - Roy Cambell
_L 0x0021CA44 0x00000010
_C0 SLOT 1
_L 0x00000000 0x00000000
_C0 SLOT 1 - 99 SNS
_L 0x0021CA78 0x00000063
_C0 SLOT 1 - Max Stamina
_L 0x0021CA74 0x00018670
_C0 SLOT 1 - Shirtless Snake
_L 0x0021CA44 0x00000012
_C0 SLOT 2
_L 0x00000000 0x00000000
_C0 SLOT 3
_L 0x00000000 0x00000000
_C0 SLOT 4
_L 0x00000000 0x00000000
_C0 Slot1 Codes(Snake)Inf.Stamina
_L 0x2021CA70 0x00018670
_C0 Slot1 Codes(Snake)Infinite Hp
_L 0x1021CA68 0x000003E7
_C0 Snake becomes jack-of-all-trades (gain all career
_L 0x2021CA80 0x0001FFFF
_C0 Snake Infinite Hp
_L 0x1021CA68 0x000003E7
_C0 Snake Max Hp
_L 0x1021CA6C 0x000003E7
_C0 Snake's Equip: Claymore
_L 0x0021CA90 0x0000001C
_C0 Snake's Life
_L 0x20251790 0x02000200
_C0 Snake's Sensor set to maximum
_L 0x1021CA78 0x000003E7
_C0 Snake's Stamina
_L 0x10251794 0x0000FFFF
_C0 Sniper Zoom Modifier: [4000 = normal, 4140 = norma
_L 0x0025125C 0x41400000
_C0 speed up time game sharing 
_L 0x012616DC 0x00001000
_L 0x012B4F48 0x00001000
_C0 SVD (x9999)
_L 0x00224448 0x000270F
_C0 Top Item: Infinite Items/Ammo
_L 0x11358B84 0x0000270F
_C0 Top Item: Max Items/Ammo
_L 0x11358B88 0x0000270F
_C0 Uzi (x9999)
_L 0x0022443A 0x000270F
_C0 XM177E2 (x9999)
_L 0x0022443E 0x000270F