NES 'Game Code Modifications' :p

[Saturn]

Here's another one I never beat way back. I'm on the last stage with a save state but still getting knocked back off of platforms to my death so taking a break. Much easier though! Finally saw what stage 3 looked like :p

Werewolf - The Last Warrior (USA)
Protection From Damage
Search: F03DAABD50CD8547A5BC38E54785BCA5
Change: F03DAABD50CD8547A5BC38E547-A5BCA5
1 instance
Floor traps (spikes/slime) can still kill you and reduce you to human state.

Infinite time
Search: A50C293FD07DC6BFA5BF8547A9008548
Change: A50C293FD07D-A5BFA5BF8547A9008548
1 instance

Only 1 anger point needed to become Super-Werewolf!
Search: 85D1AD4E04C902F012A5BEC905D00CA9
Change: 85D1AD4E04C902F012A5BEC9-01D00CA9
1 instance

Blue "W" won't change you back to a man
Search: 85BE85D1AD4E04F00BCE4E04A91D206E
Change: 85BE85D1AD4E04F00B-AD4E04A91D206E
1 instance

Walk On Water Level 4
Search: 00000000001212121212001200000000
Change: 000000000012121212-07001200000000
1 instance

[Saturn]

Another impossible game fixed..

WCW World Championship Wrestling (USA)
P1 Always Win
A646BD08051D0905F033A477B9F50029
A646BD0805-C0-0109-EAF033A477B9F50029
3 places to change, 1 instance each

[Saturn]

Never heard of this game before last night. Dead_Media_Archives was playing it live on Tiktok so I tore it a new one lol.

Monster Party (USA)
Invincible
C003AD30032404F00160A5521009ADE1
C003AD30032404F00160-60521009ADE1
1 instance

One Hit Kills Normal Enemies
A638BDA80338E5109DA803F002B020A9
A638BDA80338E5109DA803F002-F020A9
1 instance

One Hit Kills Guardians
02A2FD8AA638187D6003B002A9009D60
02A2FD8AA638187D6003B0-00A9009D60
1 instance

Monster Transformation Lasts Forever
8980A537293FD002E654A554C9199028
8980A537293FD002-A554A554C9199028
1 instance

[Saturn]

Another epic one from way back..

Predator (USA)
Infinite lives in jungle mode
Search: 05203AC6CE0405F0034CF0C12023C5AD
Change: 05203AC6-AD0405F0034CF0C12023C5AD
1 instance

Infinite lives in big mode
Search: 3029CE0405D0E52023C5AD0605D00620
Change: 3029-AD0405D0E52023C5AD0605D00620
1 instance

Infinite life points in jungle mode
Search: 650C1002A900850C6068600102030303
Change: 650C1002A900-600C6068600102030303
1 instance

Mega-jumps in jungle mode
Search: 07A90B8DAE07A9008DA407F012A9098D
Change: 07A90B8DAE07A9008DA407F012A9-088D
1 instance

Don't die if you fall down holes
Search: FB60A5EDD01BA5EFC9E89015A900850C
Change: FB60A5EDD01BA5EFC9E89015A90085-EF
&
Search: A9FE8D1D028D21028D25028D29028D2D
Change: -60FE8D1D028D21028D25028D29028D2D
1 instance each (the A9 in the 2nd one directly follows the 0C in the 1st one)

Infinite Energy
Search: F039CE8C034C1B8CAD81032908F015CE
Change: F039-EE8C034C1B8CAD81032908F015CE
1 instance

Invincible In Big Mode
Search: 00AD81032980F030AD8103090809208D
Change: 00AD810329-00F030AD8103090809208D
1 instance

Can Enter Doors Without Having To Defeat The Predator First
Go to address 0124E7 and change FF to 00
&
Go to address 01A4E7 and change FF to 00

[Saturn]

Another great one from bitd

NARC (U)
P1 & P2 Infinite Health
Search: E28D0720F006B588F052D688F6A8B5A8
Change: E28D0720F006B588F052D688-EAA8B5A8
1 instance

Infinite lives
Search: 3BBD13E495A0A90095549552952AD697
Change: 3BBD13E495A0A90095549552952A-B597
1 instance

Infinite missiles
Search: 0738E90199B107C92FD00EA93999B107
Change: 0738E9-0099B107C92FD00EA93999B107
1 instance

Infinite bullets
Search: 9978004C31D9B9AD0738E90199AD07C9
Change: 9978004C31D9B9AD0738E9-0099AD07C9
1 instance

Invincibility
Search: 008509850CB95E00F00E38E901995E00
Change: 008509850CB95E00F0-0038E901995E00
1 instance

[Saturn]

One of the best games ever made, imo

Double Dragon II - The Revenge (USA)
Player 1 Starts With 255 Lives
Search: 048D8A048D8B04A0048C3204A53429C0
Change: 048D8A048D8B04A0-FF8C3204A53429C0
1 instance

Player 2 Starts With 255 Lives
Search: 8534A53529808535A5341005A0048C33
Change: 8534A53529808535A5341005A0-FF8C33
1 instance

Never Lose Lives From Falling
Search: 8460BD3204F003DE320460BD2E0429C0
Change: 8460BD3204F003-AD320460BD2E0429C0
1 instance

Never Lose Lives From Water
Search: A900953C9D1E04B5BFE002B00ADE3204
Change: A900953C9D1E04B5BFE002B00A-AD3204
1 instance

Infinite Health
Search: A9009D1E04A9024C39B1A611B54A100B
Change: A9009D-FF-FFA9024C39B1A611B54A100B
Change 2 places, 1 instance each

Invincible without flicker
Search: 00B53C102FBDCC03C9FFF028B5C7297F
Change: 00B53C102FBDCC03C9FF-D028B5C7297F
&
Search: A90185C0A9FF8DCC038DCD03A908854A
Change: A90185C0A9-FE8DCC038DCD03A908854A
1 instance each

[Saturn]

I remember beating this one legit way back. Great game!

Trojan (USA)
Player One Starts With 99 Lives
Search: A0069D2003E888D0F9A9038DE003ADF4
Change: A0069D2003E888D0F9A9-998DE003ADF4
1 instance

Player Two Starts With 99 Lives
Search: E203A900AAA0069D2603E888D0F9A903
Change: E203A900AAA0069D2603E888D0F9A9-99
1 instance

Infinite Health For P1 And P2
Search: F0CFC96FB040AEAB03E8CE3503F003CA
Change: F0CFC96FB040AEAB03E8CE3503F003CA
1 instance

Freeze timer
Search: A003A202DE320330016088F009A9099D
Change: A003A202-2C320330016088F009A9099D
1 instance

Invincibility
Search: 31B02CA93F8D0006A50118691085014C
Change: 31B02CA93F8D0006A50118691085014C
&
Search: F3FBA92020E8FBA93F8D0006A90360AD
Change: F3FBA92020E8FBA9-FF8D0006A90360AD
1 instance each

Always Have Hi Jump Boots
Search: 1FA5C2D011AD0606C9A09014ADD10338
Change: -00A5C2D011AD0606C9A09014ADD10338
1 instance

Don't Get Stunned By Enemies
Search: 3FB066CE0006F027AD0006C914F0034C
Change: 3FB066CE0006F027AD0006C914-10034C
1 instance

[Saturn]

This version of the game always gets negative talk but with the speed walking codes and invincibility, both of the common gripes are gone. Made my way through most of the levels before getting stuck in a wall in part of a screen that hadn't fully been rendered yet. (had my warrior dude moving super fast testing a hack ) These make it so much more playable.

Ikari Warriors (USA)
Invincibility (Both Players)
Search: D002A9801DFE049DFE0460A9FED01AA9
Change: D002A9-841DFE049DFE0460A9FED01AA9
1 instance

Infinite lives
Search: 202CC34CAFF6A55ED004D6E4F015ADFD
Change: 202CC34CAFF6A55ED004-A5E4F015ADFD
1 instance

Infinite bullets
Search: 04A91C8526A5262075EFDE7F06F658B5
Change: 04A91C8526A5262075EFDE-AD06F658B5
1 instance

Infinite grenades
Search: 1AE0DE8106A9FFD002A9009556FE5806
Change: 1AE0-AD8106A9FFD002A9009556FE5806
1 instance

Start with 99 grenades
Search: 329D81062075FE200EE0A9402002DD20
Change: -639D81062075FE200EE0A9402002DD20
1 instance

Long Shot for Bullets
Search: 26BD5806C52660A9088526A92C4C13BC
Change: 26BD5806C5-0A60A9088526A92C4C13BC
1 instance

Infinite missiles for tank
Search: 062904F004A91D8526A5262075EFDE81
Change: 062904F004A91D8526A5262075EF-AD81
1 instance

Faster Super Walking Speed
Search: 05F006C90BD005A9039D3C06BD740629
Change: 05F006C90BD005A9039D3C06BD7406-09
&
Search: 404A4A4A4A1865622002DD689D3C0620
Change: 40-EA4A4A4A1865622002DD689D3C0620
1 instance each

Always Have Bomb Grenades
Search: C8C626D0F6F036BD74064A4A4A290118
Change: C8C626D0F6F036BD74064A4A4A-090118
1 instance

Activates Stage Select Cheat
Search: A566C920F004C920D073A900853F8540
Change: A566C9-00F004C920D073A900853F8540
1 instance

[Saturn]

Another hit that defined the console back when I played. I remember spending hours upon hours tearing this game up to fight that final boss. Epic

Blaster Master (USA)
Invincible (Complete)
Search: 297F957E9860A211A900957CCA10FB60
Change: 297F957E-EA60A211A900957CCA10FB60
&
Search: F00BA514C905F008A9008553AAA90060
Change: F00BA514C905F008A9008553AAA9-7F60
&
Search: D002C650A54DC932B006A900854DF024
Change: D002C650A54DC932B0-00A900854DF024
&
Search: 4CBCA2A90038E5068506A90F18651DA6
Change: 4CBCA2A90038E50685-00A90F18651DA6
1 instance each

Start With 99 Of Each Weapon
Search: 08001208F8002100080022F1F3101700
Change: 08001208F800210008-6322F1F3101700
&
Search: 14A90285DD2014CAA900851385108511
Change: 14A90285DD2014CAA9-63851385108511
1 instance each

Infinite lives
Search: D028A93D20CCDEC6DD1016CE7E03F01A
Change: D028A93D20CCDE-A5DD1016CE7E03F01A
1 instance

Infinite homing missiles
Search: 46850020CFD7F028CEF0068A4820C0D7
Change: 46850020CFD7F028-2CF0068A4820C0D7
1 instance

Infinite Thunderbreaks
Search: CEF106A9179D00044CC0D760EAEAEAA9
Change: -2CF106A9179D00044CC0D760EAEAEAA9
1 instance

Infinite multi-warheads
Search: 48BD0004D00BA9199D000420C0D7CEF2
Change: 48BD0004D00BA9199D000420C0D7-2CF2
1 instance

Infinite Hover
Search: 03D005A93020CCDEC692A54D38E90110
Change: 03D005A93020CCDE-A592A54D38E90110
1 instance

Extra codes:

Infinite Continues
Search: D028A93D20CCDEC6DD1016CE7E03F01A
Change: D028A93D20CCDEC6DD1016CE-8703F01A
1 instance

Invulnerability To Enemies
Search: A53F38E5018501A20FB57E301AF01885
Change: A53F38E5018501A20FB57E301A-D01885
1 instance

Don't Lose Gun When Taking Damage
Search: C3F002C6C3A200A5472903C901D002A2
Change: C3F002-A5C3A200A5472903C901D002A2
1 instance

Drops Don't Kill You
Search: 38E940B002A9008553A9E0854DA553D0
Change: 38E940B002A9-FF8553A9E0854DA553D0
1 instance

Faster Bullets
Search: 808543A5B9C903B00620DBD24CA29720
Change: 808543A5B9C903-500620DBD24CA29720
1 instance

[Saturn]

Here's a tough one I could never beat. Now, it's a piece of cake 

Batman - The Video Game (USA)
Invulnerability
Search: 85104C8699A5CC300DA90820C0C8A611
Change: 85104C8699A5CC-100DA90820C0C8A611
1 instance

Invincible Against Background Hazards (1 of 3)
Search: 442960D035A5252990F03AA5178511A5
Change: 442960D0-45A5252990F03AA5178511A5
1 instance

Invincible Against Background Hazards (2 of 3)
Search: 132000C0240F1002500BC6B7A90820C0
Change: 132000C0240F10-00-B00BC6B7A90820C0
Change 2 places, 1 instance each

Invincible Against Background Hazards (3 of 3)
Search: 300F240F500BC6B7A90820C0C8A98085
Change: -100F240F500BC6B7A90820C0C8A98085
&
Go to address 009430 & change 30 to 10

Infinite lives
Search: C4200C80C6BEA203A5B8D002A200860F
Change: C4200C80-A5BEA203A5B8D002A200860F
1 instance

Infinite pellets after pick-up
Search: 801D6A059D6A0560A5B838E507C964B0
Change: 801D6A059D6A0560A5B838-2407C964B0
1 instance

[Saturn]

One more for the day. I played the hell out of this one too way back.

Legendary Wings:
Infinite Lives (1 of 2)
Search: C90CF0016024FF3004D658F007A90095
Change: C90CF0016024FF3004-A558F007A90095
1 instance

Infinite Lives (2 of 2)
Search: C980D0239556A5FFD019D658D015A510
Change: C980D0239556A5FFD019-A558D015A510
1 instance

[Saturn]

Another fun but difficult masterpiece. I never beat it bitd.

Iron Tank - The Invasion of Normandy (USA)
Super strong tank
Search: 08688DF10738BD0603F906039D060308
Change: 08688DF10738BD0603F90603-BD060308
1 instance

Infinite lives (1 of 2)
Search: A96C186DD1012058F6A9112051C3A501
Change: A96C186DD1-D12058F6A9112051C3A501
1 instance

Infinite lives (2 of 2)
Search: 208CC4A9052073C3202C8620ACC3CED1
Change: 208CC4A9052073C3202C8620ACC3-ADD1
1 instance

Start with 9 lives (1 of 2)
Search: A96C186DD1012058F6A9112051C3A501
Change: A96C186DD1-D12058F6A9112051C3A501
1 instance

Start with 9 lives (2 of 2)
Search: ADF0068505ADF106850660A9028DD101
Change: ADF0068505ADF106850660A9-088DD101
1 instance

Start With All Weapons Full
Search: 0003000008075F96075F080751960751
Change: -2803000008075F96075F080751960751
&
Search: 0090AE004B450043002F2E2D2C000000
Change: -2890AE004B450043002F2E2D2C000000
&
Search: 00080A8000080D80040C0230000206C0
Change: -28080A8000080D80040C0230000206C0
&
Search: 006804E000974504F0004504E4006804
Change: -286804E000974504F0004504E4006804
&
Search: 00854085418539853A853B853C853D85
Change: -28854085418539853A853B853C853D85

[Saturn]

Another EPIC one from way back (in my youth lol) Spent a LOT of weekends and after school mastering this game. Didn't even remember there was an overhead view or top down battle scenario view. Man, how time flies!

Rygar (USA)
Infinite Health
Search: DEAE85CBB00AA9100D92048D9204D007
Change: DEAE-A5CBB00AA9100D92048D9204D007
1 instance

Don't Be Pushed After Being Hit
Search: 40D129E08504A5C9E505291F06040504
Change: 40D129E08504A5C9E505291F0604-6004
1 instance

Invincibility
Search: 608406A9142000CDA406A9008D07038D
Change: 60-6006A9142000CDA406A9008D07038D
1 instance

1 Hit Kills Enemies
Search: C7290F4A05006A6A6A8500A9002A8501
Change: C7290F4A05006A6A6A8500A9002A-1101
1 instance

Jump Higher
Search: 01A4000A260188D0FA60A904187DC204
Change: 01A4000A260188D0FA60A9-03187DC204
1 instance

Start With All Items (1 of 3)
Go to address 00F28D & change 00 to F0
Go to address 01528D & change 00 to F0
Go to address 01D28D & change 00 to F0

Start With All Items (2 of 3)
Go to address 01528F & change 08 to C0

Start With All Items (3 of 3)
Go to address 015291 & change 09 to C1

Start with maximum Tone
Search: 205445434D4F204C74642E00001E000A
Change: 205445434D4F204C74642E00001E-FF0A
1 instance

Start with maximum Last
Go to address 01C0BF & change 0A to FF

Pits Aren't Fatal (side view)
Search: E9D4C908B007A90285084C47A3A4FFB9
Change: E9D4C9-00B007A90285084C47A3A4FFB9

Enemies Always Drop Mind Unit (EXTREMELY helpful for fast upgrading the attacks!)
Search: 09011865C2C914B00585C24CCBB0A900
Change: 09011865C2C914-900585C24CCBB0A900
1 instance
&
Search: 059D1205A9009D8F05201FCEA61E2907
Change: 059D1205A9009D8F05201FCEA61E-A9-04
Change 2 places, 1 instance each

Walk on Water (overhead view) (not good for exploration, really only use to not die by accident stepping in water. Exploration randomly kills player)
Search: 9EC1A3109EDC9ED79F20AD2205D0048D
Change: 9EC1A3109EDC9ED79F20AD2205-50048D
1 instance

Start With Inf Medicine
Search: 8509A000202583A5C18508A904850920
Change: 8509A000202583-85C18508A904850920

[Saturn]

Here are 18 incredible ROM hacks for an excellent game. Another one that I played endlessly looong time ago.
I use the '$6 million plus to start' hack but it resets later (after you've had the chance to buy plenty of stuff) when you start grabbing actual coins from fallen enemies. But, with the 'everything is free' and 'Infinite money' hacks, you can't go wrong. The 'every coin worth hella more' hack rebuilds any loss fairly quickly too so there's that.

Faxanadu (USA)
1) Coins that enemies drop are worth hella more
Go to addresses 018BBD 032BBD 038BBD 03CBBD & change 00 to FF

2) Makes Most Weapons Much Stronger
Go to addresses 00E8A6 0228A6 0288A6 0388A6 & change 00 to FF

3) Invincible (1 of 2)
Search: 100B20AE89AE7803A9FF9DCC0260A5AD
Change: 100B20AE89AE7803A9FF9DCC0260-60AD
1 instance

Invincible (2 of 2)
Search: BCCC02C0FFF033B944B5C906D02CADE4
Change: BCCC02C0FFF033B944B5-A906D02CADE4
1 instance

4) Start With 6711680 Gold
Search: 038D91038D92038D93038D94038DED04
Change: 038D91038D92038D9303-8E94038DED04
1 instance

5) Items Are Free
Search: EC8D0202BD300285ED8D030220DC87B0
Change: EC8D0202BD300285ED8D030220DC87-50
1 instance

6) Full starting power
Search: D803856C4C46DDA900852420AAE0A910
Change: D803856C4C46DDA900852420AAE0A9-99
1 instance

7) Infinite Health
Search: 0438EDBC048D3204AD3104EDBD048D
Change: 0438EDBC048D3204AD3104EDBD04-AD
1 instance

8 ) Infinite Gold (1 of 2)
Search: A0024C06FAAD920338E5EC8D9203AD93
Change: A0024C06FAAD920338E5EC-AD9203AD93
1 instance

Infinite Gold (2 of 2)
Search: 03E5ED8D9303AD9403E9008D94034C
Change: 03E5ED-AD9303AD9403E900-AD94034C
Change 2 places, 1 instance each

9) Infinite magic
Search: 0201020C020D020E020F020A020B0220
Change: 0201020C020D020E-000F020A020B0220
&
Search: 04A000F00BC9519002A9508D9A03A001
Change: 04A000F00BC95190-00A9508D9A03A001
1 instance each

10) Can Use Spells Without Magic
Search: 4C75FAAEC003AD9A0338FDA9B790088D
Change: 4C75FAAEC003AD9A0338FDA9B7-80088D
1 instance

11) Infinite power
Go to address 03C0A2 & 03C0AB and change ED to 2C

12) Open Any Door Without Key
Search: 2B04F00A0AA8B940EB48B93FEB48603D
Change: 2B04F00A0AA8-AD40EB48-AD3FEB48603D
Change 2 places, 1 instance each
&
Search: 40EB48B93FEB48603D
Change: 40EB48B93FEB4860-D0
1 instance

13) Infinite MP
Go to address 03C0DF and change 8D to AD

14) One Hit Kill
Go to address 0388AA and change B0 to 24


15) Infinite Ointment Time
Search: 0C418260AD27043013A51A293FD00DCE
Change: 0C418260AD27043013A51A293FD00D-AD
1 instance

16) Infinite Wing Boots Time
Search: 3025A5A5098085A5A51A293FD019CE29
Change: 3025A5A5098085A5A51A293FD019-AD29
1 instance

17) Infinite Hour Glass Time
Search: A51A293FD012CE2A04100DA9972059F8
Change: A51A293FD012-AD2A04100DA9972059F8
1 instance

18) Start With All Special Items
Search: 2045F888D0FA86206085E286E384E468
Change: 2045F888D0FA86206085E2-84E384E468
&
Search: A9008D39048D37048D2C048D2D04A2FF
Change: A9008D39048D3704-8E2C048D2D04A2FF

[Saturn]

Yet another classic has been hacked to pieces and made easy

Mega Man 4 (USA)
Infinite lives
Search: A1F0EFC6A1A900859A4C41C5A91B85F5
Change: A1F0EF-A5A1A900859A4C41C5A91B85F5
1 instance

Infinite weapon power
Search: 8EFDB002A900098099B00068A8600002
Change: 8EFDB002A9000980-2CB00068A8600002
1 instance

Infinite Energy
Search: B0291F38F91384F0569054098085B0A9
Change: B0291F38F91384F05690540980-A5B0A9
1 instance

255 Maximum Lives
Search: 00A91F20BEF6A5A1C909F045E6A14C41
Change: 00A91F20BEF6A5A1C9-FFF045E6A14C41
1 instance

Invulnerability
Search: 90F4BD08041012A53CD00EA530C906B0
Change: 90F4BD0804-3012A53CD00EA530C906B0
1 instance

Invincibility Against Spikes
Search: 4CCC81A53DF00DA530C906B007A53CD0
Change: 4CCC81A53DF00DA530C906B007A53C-50
1 instance