Level Select 

       To choose any stage in the game, simply hold R1+L1+Start+Select at the title screen

Gameshark codes

Inf Ammo Shotgun lvl 21 80198d3c000f
Gordanski: Inf Health lvl 21 8019558c0200
Infinite Health lvl 22 801919c000c8
Inf Ammo Pistol lvl 22 801919be010f
Baalrog: 1-Hit Kill lvl 22 801942000001  801942200001
Stop Timer lvl 23 80189390b4bd
Roper: Inf Health lvl 23 8018ab240200
Roper: Inf Ammo Pistol lvl 23 8018ab22010f
Roper: Inf Ammo Shtgn lvl 23 8018d97c000f  8018d9a4000f
Stern: Infinite Health lvl 23 8018b32400c8
Stern: Inf Ammo Pistol lvl 23 8018b322010f
Roper: Inf Health lvl 18 801944940200
Roper: Inf Ammo Shtgn lvl 18 801973c0000f
Roper: Inf Ammo Pistol lvl 18 80194492010f
Stop Timer lvl 18 8018ef183ea0
Roper: Infinite Health lvl 18 801943140200
Roper: Inf Ammo Pistol lvl 18 80194312010f
Infinite Health lvl 19 8019854400c8
Inf Ammo Pistol lvl 19 80198542010f
Inf Ammo Mchgun lvl 19 8019ae4001a
Stop Timer lvl 20 80194ce4a146
Infinite Health lvl 20 8019675800c8
Inf Ammo Pistol lvl 20 80196756010f
Inf Ammo Shotgun lvl 20 80199c8c000f
Stop Timer lvl 21 800ed9ca3835
Infinite Health lvl 21 8019550c00c8
Inf Ammo Pistol lvl 21 8019550a010f
Inf Ammo Mch Gun lvl 14 80199720000f
Infinite Health lvl 15 801955b800c8
Inf Ammo Pistol lvl 15 801955b6010f
Inf Ammo Shotgun lvl 15 80199af8000f
Inf Ammo Mch Gun lvl 15 8019951c000f
Roper: Inf Ammo Shtgn lvl 16 80198358000f
Roper: Infinite Health lvl 16 8019283c0200
Roper: Inf Ammo Pistol lvl 16 8019283a010f
Infinite Health lvl 17 8019260400c8
Inf Ammo Pistol lvl 17 80192602010f
Inf Ammor Shotgun lvl17 80196f48000f
Inf Ammo Machinegun 17 80197498001a
Infinite Health lvl 18 8019231400c8
Inf Ammo Pistol lvl18 80192312010f
Inf Ammo Shotgun lvl 18 80197424000f
Inf Ammo Mchgun lvl 18 80197528000f
Inf Ammo Pistol lvl 11 80194dd2010f
Inf Ammo Shotgun lvl 11 801992f0000f
Stop Timer lvl 11 801927e41b8c
Infinite Health lvl 12 8019146c00c8
Inf Ammo Pistol lvl 12 8019146a010f
Inf Ammo Shotgun lvl 12 801954b4000f
Roper: Inf Health lvl 12 801918ec0200
Roper: Inf Ammo Shtgn lvl 12 801950a4000f
Roper: Inf Ammo Pistol lvl 12 801918ea010f
Crime Rate 0% lvl 13 800cff000000
Infinite Health lvl 13 8019495c00c8
Inf Ammo Pistol lvl 13 8019495a010f
Inf Ammo Shotgun lvl 13 8019900c000f
Inf Health lvl 14 8019487400c8
Inf Ammo Pistol lvl 14 80194872010f
Inf Ammo Shotgun lvl 14 801996f8000f  8019970c000f
Inf Shot Gun Ammo lvl 7 801990e8000f
Stop Timer lvl 8 8019329c3ad7
Infinite Health lvl 8 80195a2000c8
Inf Ammo for Pistol lvl 8 80195a1e010f
Inf Ammo for Shotgun lvl 8 801986f4000f
Stop Timer lvl 9 80192e241fe0
Infinite Health lvl 9 8019682400c8
Infinite Pistol Ammo lvl 9 80196822010f
Inf Ammo Shotgun lvl 9 801998a8000f
Stop Second Timer lvl 9 80193bc41b76
No Damage Sedan lvl 9 80195e7e012c  801960a6012c
Infinite Health lvl 10 801954d400c8
Inf Ammo Pistol lvl 10 801954d2010f
Inf Ammo Shotgun lvl 10 8019922c000f
No Damage Cop Car lvl 10 80194426012c
Infinite Health lvl 11 80194dd400c8
1-Hit Kill Park Gangster 3 L 4 80194fb40001
1-Hit Kill Park Gangster 4 L 4 80195db40001
Infinite Health lvl 5 801914c400c8
Inf Ammo Mch Gun lvl 5 80196794000f
Inf Ammo for Pistol lvl 5 801914c2010f
1-Hit Kill Entr Gangster 1 L 5 801918440001
1-Hit Kill Entr Gangster 2 L 5 801911c40001
1-Hit Kill Entr Gangster 3 L 5 801920440001
1-Hit Kill Entr Gangster 4 L 5 801943c40001
Infinite Health lvl 6 80194c0400c8
Infinite Pistol Ammo lvl 6 80194c02010f
Infinite M16 Ammo lvl 6 80198de0000f
Inf Shot Gun Ammo lvl 6 80198d70000f
Infinite Health lvl 7 801955ac00c8
Infinite Pistol Ammo lvl 7 801955aa010f
Infinite M16 Ammo lvl 7 801990c0000f
No Damage to Cab lvl 1 8019439e012c
1-Hit Kill Park Crook lvl 1 80195a440001
1-Hit Kill Muggers lvl 1 801961440001
Infinite Heath lvl 2 80194f6c00c8
1-Hit Kill Park CrckHead lvl 3 8019556c0001
Always Have Gun lvl 4 80194f640008
Infinite Health lvl 3 8019561800c8
No Damage Cop Car lvl 3 801944b2012c
Infinite Ammo lvl 3 80195616010f
Always have Gun lvl 3 80195610 0008
1-Hit Kill Roof Gangster lvl 3 80195b180001
Infinite Heath lvl 4 801914c400c8
No Damage Cop Car 1 lvl 4 8019394e012c
No Damage Cop Car 2 lvl 4 8019366e012c
1-Hit Kill Park Gangster 1 L 4 80195b340001
1-Hit Kill Park Gangster 2 L 4 80195bb40001
Stop Training Timer 801971842b28
Infinite Ammo lvl 1 80194f6a010e
Infinite Heath lvl 1 80194f4400c8