Complete the game on any difficulty level and then wait for the ending credits to complete. Then select Start or Load from the main menu to access a cheat menu. You will then be able to choose from the following cheats: Infinite Lives, Play as a Monster, or Level Select.

Level - Password

2 - Up, Down, C-Up, C-Down, C-Up, Down, Left, C-Right 
4 - Up, Left, C-Up, C-Down, C-Up, Left, C-Up, C-Right 
5 - Up, C-Down, C-Up, Left, C-Up, C-Left, C-Down, Left 
9 - Up, Right, C-Up, C-Down, C-Up, C-Up, C-Right, C-Right 
11 - Down, Left, C-Up, Down, C-Up, C-Right, C-Left, Up 
13 - Down, C-Left, Right, C-Down, Up, C-Down, Down, Up 
14 - Down, C-Down, C-Right, C-Left, C-Up, C-Up, Left, C-Up 
16 - Left, C-Left, C-Up, C-Left, C-Up, Down, C-Right, C-Left 

Game Shark Codes

Ignatius Chelsea Level Codes 
Hack Mode - 812EC658 2000 
Infinite Health - 812EC6E6 1000 
Walk Through Walls - 812EC6E8 1000 
Ignatius Spitafields Level Codes 
Hack Mode - 81321570 2000 
Infinite Health - 813215FE 1000 
Walk Through Walls - 81321600 1000 
Ignatius Thames Tunnel Level Codes 
Hack Mode - 8131AAE0 2000 
Infinite Health - 8131AB6E 1000 
Walk Through Walls - 8131AB70 1000 
Ignatius Sewer Snake Level Codes 
Hack Mode - 81255DB8 2000 
Infinite Health - 81255E46 1000 
Walk Through Walls - 81255E48 1000 
Ignatius India Docks Level Codes 
Hack Mode - 813214B8 2000 
Infinite Health - 81321546 1000 
Walk Through Walls - 81321548 1000 
Ignatius Highgate Cemetery Level Codes 
Hack Mode - 8131B258 2000 
Infinite Health - 8131B2E6 1000 
Walk Through Walls - 8131B2E8 1000 
Ignatius Hampstead Heath Level Codes 
Hack Mode - 81321828 2000 
Infinite Health - 813218B6 1000 
Walk Through Walls - 813218B8 1000 
Ignatius Queenhite Docks Level Codes 
Hack Mode - 81320B90 2000 
Infinite Health - 81320C1E 1000 
Walk Through Walls - 81320C20 1000 
Ignatius City Level Codes 
Hack Mode - 813281C8 2000 
Infinite Health - 81328256 1000 
Walk Through Walls - 81328258 1000 
Ignatius Smithfield Level Codes 
Hack Mode - 8130AFD0 2000 
Infinite Health - 8130B05E 1000 
Walk Through Walls - 8130B060 1000 
Ignatius Snowman Level Codes 
Hack Mode - 81251408 2000 
Infinite Health - 81251496 1000 
Walk Through Walls - 81251498 1000 
Ignatius Regent's Level Codes 
Hack Mode - 81315398 2000 
Infinite Health - 81315326 1000 
Walk Through Walls - 81315328 1000 
Ignatius London Zoo Level Codes 
Hack Mode - 8131DF80 2000 
Infinite Health - 8131E00E 1000 
Walk Through Walls - 8131E010 1000 
Ignatius St. Marilebone Level Codes 
Hack Mode - 8131CC40 2000 
Infinite Health - 8131CD4E 1000 
Walk Through Walls - 8131CD50 1000 
Ignatius Bloomsbury Level Codes 
Hack Mode - 8132C468 2000 
Infinite Health - 8132C4F6 1000 
Walk Through Walls - 8132C4F8 1000 
Ignatius Pimlico Level Codes 
Hack Mode - 8131F940 2000 
Infinite Health - 8131F9CE 1000 
Walk Through Walls - 8131F9D0 1000 
Ignatius Jose Manuel Level Codes 
Hack Mode - 8125F108 2000 
Infinite Health - 8125F196 1000 
Walk Through Walls - 8125F198 1000 
Ignatius Westminister Level Codes 
Hack Mode - 812F4E40 2000 
Infinite Health - 812F4ECE 1000 
Walk Through Walls - 812F4ED0 1000 
Ignatius Westminister II Level Codes 
Hack Mode - 812F5D58 2000 
Infinite Health - 812F5DE6 1000 
Walk Through Walls - 812F5DE8 1000 
Ignatius The Roofs Level Codes 
Hack Mode - 81284870 2000 
Infinite Health - 812848FE 1000 
Walk Through Walls - 81284900 1000 
Nadia Chelsea Level Codes 
Hack Mode - 812EB648 2000 
Infinite Health - 812EB6D6 0C0C 
Walk Through Walls - 812EB6D8 1000 
Nadia Spitafield Level Codes 
Hack Mode - 81320188 2000 
Infinite Health - 81320116 0C0C 
Walk Through Walls - 81320118 1000 
Nadia Thames Tunnel Level Codes 
Hack Mode - 81319A38 2000 
Infinite Health - 81319AC6 0C0C 
Walk Through Walls - 81319AC8 1000 
Nadia Sewer Snake Level Codes 
Hack Mode - 81254898 2000 
Infinite Health - 81254926 0C0C 
Walk Through Walls - 81254928 1000 
Nadia India Docks Level Codes 
Hack Mode - 81320240 2000 
Infinite Health - 813202CE 0C0C 
Walk Through Walls - 813202D0 1000 
Nadia Highgate Cemetary Level Codes 
Hack Mode - 8131A500 2000 
Infinite Health - 8131A58E 0C0C 
Walk Through Walls - 8131A590 1000 
Nadia Hampstead Heath Level Codes 
Hack Mode - 81320348 2000 
Infinite Health - 813203D6 0C0C 
Walk Through Walls - 813203D8 1000 
Nadia Queenhite Dock's Level Codes 
Hack Mode - 8131FAF0 2000 
Infinite Health - 8131FB7E 0C0C 
Walk Through Walls - 8131FB80 1000 
Nadia City Level Codes 
Hack Mode - 813269A8 2000 
Infinite Health - 81326A36 0C0C 
Walk Through Walls - 81326A38 1000 
Nadia Smithfield Level Codes 
Hack Mode - 8130A040 2000 
Infinite Health - 8130A0CE 0C0C 
Walk Through Walls - 8130A0D0 1000 
Nadia Snowman Level Codes 
Hack Mode - 8124FFA8 2000 
Infinite Health - 81250036 0C0C 
Walk Through Walls - 81250038 1000 
Nadia Regent's Canal Level Codes 
Hack Mode - 81313DA8 2000 
Infinite Health - 81313E36 0C0C 
Walk Through Walls - 81313E38 1000 
Nadia London Zoo Level Codes 
Hack Mode - 8131CAD8 2000 
Infinite Health - 8131CB66 0C0C 
Walk Through Walls - 8131CB68 1000 
Nadia St. Marilebone Level Codes 
Hack Mode - 8131B5F8 2000 
Infinite Health - 8131B686 0C0C 
Walk Through Walls - 8131B688 1000 
Nadia Bloomsbury Level Codes 
Hack Mode - 8132B1C8 2000 
Infinite Health - 8132B256 0C0C 
Walk Through Walls - 8132B258 1000 
Nadia Pimlico Level Codes 
Hack Mode - 8131E428 2000 
Infinite Health - 8131E4B6 0C0C 
Walk Through Walls - 8131E4B8 1000 
Nadia Jose Manuel Level Codes 
Hack Mode - 8125D980 2000 
Infinite Health - 8125DA0E 0C0C 
Walk Through Walls - 8125DA10 1000 
Nadia Westminister Level Codes 
Hack Mode - 812F3580 2000 
Infinite Health - 812F360E 0C0C 
Walk Through Walls - 812F3610 1000 
Nadia Westminister II Level Codes 
Hack Mode - 812F4BE8 2000 
Infinite Health - 812F4C76 0C0C 
Walk Through Walls - 812F4C78 1000 
Nadia The Roofs Level Codes 
Hack Mode - 81282D28 2000 
Infinite Health - 81282DB6 0C0C 
Walk Through Walls - 81282DB8 1000 
All Level Codes 
Infinite Spider Cards - 810A4BAE 0009 
Infinite Proximity Mines - 810A4BB0 0009 
Infinite Repulsive Smoke - 810A4BB2 0009 
Infinite Freeze Spell - 810A4BB4 0009 
Infinite Dynamite - 810A4BB6 0009 
Infinite Flash - 810A4BB8 0009 
Infinite Fire Bombs - 810A4BBA 0009 
Infinite Multi-Gun - 810A4BBC 0009 
Infinite Berzerkers - 810A4BBE 0009 
Infinite Super Healing - 810A4BC0 0009 
Infinite Healing - 810A4BC2 0009 
Infinite Chaos - 810A4BC4 0009 
Infinite Gun - 810A4BC6 0009 
Infinite Lives - 800A4B53 0009 
Turn Health Meter Off (Not Invincible-Buggy) - 800A4BD3 0001 
Level Modifier - 810978B0 00?? 
Start on Level Modifier - D00978B1 0000 or 810978B0 00?? 
Quantity Digits to Accompany Level Modifier Codes 
00 - Chelsea 
01 - Spitafields 
02 - Thames Tunnel 
03 - Sewer Snake 
04 - India Docks 
05 - Highgate Cemetery 
06 - Hampstead Heath 
07 - Queenhite Docks 
08 - City 
09 - Smithfield 
0A - Snowman 
0B - Regent's 
0C - London Zoo 
0D - St. Marilebone 
0E - Bloomsbury 
0F - Pimlico 
10 - Jose Manuel 
11 - Westminister 
12 - Westminister II 
13 - The Roofs 
14 - Map