Sega Mega CD ISO Hacks & Editors

[Saturn025]

Ultraverse Prime (U)

Infinite Lives: 1 instance
Search: 000185680000E6540439000100080074
Change: 000185680000E6546004000100080074

Invulnerability (after 1st death): 1 instance
Search: 11063E3C000830106700001A04500001
Change: 11063E3C000830106700001A60060001

Infinite Health: 1 instance (Full=40)
Search: 670000966A00001A0479000100081276
Change: 670000966A00001A0479000100086004

Infinite Special Weapon (on pickup): 1 instance
Search: FFA041F90008144E0479000100080086
Change: FFA041F90008144E6006000100080086

[Saturn025]

BC Racers (U)

Infinite Health hacks: 13 instances total

Infinite Health 1: 2 instances, change both
Search: 0000C312D06C006EEA4091790000C320
Change: 0000C312D06C006EEA4060040000C320

Infinite Health 2: 3 instances, change all
Search: C2F430390000C312E84091790000C320
Change: C2F430390000C312E84060040000C320

Infinite Health 3: 1 instance
Search: 342C00365842C5FC009695790000C320
Change: 342C00365842C5FC009660040000C320

Infinite Health 4: 3 instances, change all
Search: C2F430390000C312E44091790000C320
Change: C2F430390000C312E44060040000C320

Infinite Health 5: 1 instance
Search: C32632390000C320067908000000C320
Change: C32632390000C320600208000000C320

Infinite Health 6: 1 instance
Search: C322B0790000C3206E0633C00000C320
Change: C322B0790000C320600233C00000C320

Infinite Health 7: 1 instance
Search: 33FC00020000C31C04790C000000C320
Change: 33FC00020000C31C60020C000000C320

Infinite Health 8: 1 instance
Search: 33FC00050000C2F4047902000000C320
Change: 33FC00050000C2F4600202000000C320


Other hacks:

Infinite Continues: 1 instance
Search: 46CA3E3C00104EB9000246CA53787518
Change: 46CA3E3C00104EB9000246CA53786004

Make "4 Laps" unchangeable in Options screen: 1 instance
Search: 663233FC000100008C46527900008C24
Change: 663233FC000100008C46600400008C24

[Saturn025]

A/X-101 (U)

Infinite Shields: 2 instances, change 2nd instance only
Search: 000701204EB90000A81433C100070120
Change: 000701204EB90000A814600400070120

Infinite Bombs: 1 instance
Search: 01226F184EBA00186612537900070122
Change: 01226F184EBA00186612600400070122

Infinite GPOW: 1 instance (Full = 20)
Search: 4EBA001866124EBA01663B7CFFFF0048
Change: 4EBA001866124EBA01666004FFFF0048

[Saturn025]

Cyborg 009 (J)

Infinite Lives: 10 instances, change all
Search: 4E7533FC000100FF4110537900FF4108
Change: 4E7533FC000100FF4110600400FF4108

Invulnerability Stage 1: 1 instance
Search: 000000200E0466024E75537900200E04
Change: 000000200E0466024E75600400200E04

Invulnerability Stage 1 Boss: 1 instance
Search: 00000020035666024E75537900200356
Change: 00000020035666024E75600400200356

Invulnerability Stage 2: 1 instance
Search: 00202ECE660000044E75537900202ECE
Change: 00202ECE660000044E75600400202ECE

Invulnerability Stage 2 Boss: 1 instance
Search: 00000020046866024E75537900200468
Change: 00000020046866024E75600400200468

Invulnerability Stage 3: 1 instance
Search: 0000002009EE66024E755379002009EE
Change: 0000002009EE66024E756004002009EE

Invulnerability Stage 4: 1 instance
Search: 0000002003EE66024E755379002003EE
Change: 0000002003EE66024E756004002003EE

Invulnerability Stage 5: 1 instance
Search: 00000020102066024E75537900201020
Change: 00000020102066024E75600400201020

Invulnerability Stage 6: 1 instance
Search: 00202688660000044E75537900202688
Change: 00202688660000044E75600400202688

Invulnerability (stage 6 Boss): 1 instance
Search: 00000020058E66024E7553790020058E
Change: 00000020058E66024E7560040020058E

Invulnerability Stage 7: 1 instance
Search: 00000020074C66024E7553790020074C
Change: 00000020074C66024E7560040020074C

Invulnerability Stage 8: 1 instance
Search: 0000002004E466024E755379002004E4
Change: 0000002004E466024E756004002004E4

Invulnerability (stage 8 Boss): 1 instance
Search: 00000020052466024E75537900200524
Change: 00000020052466024E75600400200524

[Saturn025]

Heavy Nova (J)

Infinite Health: 3 instances, change all
Search: 00008C3A3011425141F900008C269150
Change: 00008C3A3011425141F9000060049150

Invulnerability (non boss stages): 1 instance
Search: 4E754A79000306306708537900030630
Change: 4E754A79000306306708600400030630

Stop Boss Timer: 1 instance
Search: 670E08B9000000008F68537900008F6C
Change: 670E08B9000000008F68600400008F6C

Stamina (Boss Fights): 3 instances, change all
Search: 8C26EA4866027001D07900008C36D150
Change: 8C26EA4866027001D07900006004D150

[Saturn025]

Earnest Evans (J)

Infinite Continues: 1 instance
Search: 4EB900209C6C4CDF3FFF4E755378BF10
Change: 4EB900209C6C4CDF3FFF4E756002BF10

Infinite Life Bars/Health: 1 instance
Search: A4B06400004806780040A4B05378A4AE
Change: A4B06400004806780040A4B053786004

Infinite Weapon: 1 instance
Search: 00FF6700000C53006700000817400020
Change: 00FF6700000C53006700000860020020

Invulnerability: 1 instance
NOTE: Useless. Makes the player invisible.
Search: A5E63038B62867000010534031C0B628
Change: A5E63038B62867000010600431C0B628

[Saturn025]

Sengoku Densyo (J)

Infinite Health: 1 instance
Search: 670808F900060000B6909D790000B646
Change: 670808F900060000B69060040000B646

Infinite Lives: 2 instances, change both
Search: 4A390000B64A67003F1053390000B64A
Change: 4A390000B64A67003F1060020000B64A

Invulnerable (after 1st hit @ each battle): 10 instances, change all
Search: 00000000B69C671A13FC00300000B6A0
Change: 00000000B69C671A600400300000B6A0

Infinite Primary Special Weapon: 2 instances, change both
Search: 671E4A790000B6C8674A53790000B6C8
Change: 671E4A790000B6C8674A60040000B6C8

Infinite Divine Special Weapon: 2 instances, change all
NOTE: This is the weapon forced on you after fighting in the clouds. It usually lasts about 30 seconds and isn't as powerful as some other Primary weapons (like the awesome yellow ball) and with this hack it stays with you until the end of the stage. Not real valuable but it was difficult to find and I wanted to see if I could :P
Search: 14D44A790000B6CC670853790000B6CC
Change: 14D44A790000B6CC670860040000B6CC

Infinite Change Timer: 2 instances, change both
Search: 4E754A390000B64F670853390000B64F
Change: 4E754A390000B64F670860040000B64F

[Saturn025]

Devastator (J)

Infinite Health: 7 instances, change all
NOTE: It's still instant death if you're eaten by the Giant plants or stuck behind an object on the side scrolling flying stages
Search: 00103228002892406F00002431410028
Change: 00103228002892406F00002460020028

Infinite Lives: 1 instance
Search: 76104EB90020AAA8600000645378A004
Change: 76104EB90020AAA8600000646006A004

Invulnerability: 7 instances, change all
NOTE: Makes the player invisible lol
Search: 00FFA1004A68003A670000065368003A
Change: 00FFA1004A68003A670000066002003A

[Saturn025]

Batman Returns

NOTE: Game may hang for a few seconds at SegaCD BIOS screen after modding the ROM

Stop Timer (Driving/Batskiboat): 5 instances, change all
Search: 663441F90007808C4A50672A53680002
Change: 663441F90007808C4A50672A60020002

Infinite Missiles (Driving): 3 instances, change all
Search: 003C237C00012A76006853790007808A
Change: 003C237C00012A76006860040007808A

Infinite Health (Driving): 5 instances, change all
NOTE: makes enemies invincible too, so this hack is useless
Search: D0810C800000FFFF650270FF33400082
Change: D0810C800000FFFF650270FF60040082

Infinite Lives (Driving/Batskiboat): 5 instances, change all
Search: 43F90007808632FC000144FC00008109
Change: 43F90007808632FC0001600600008109

Infinite Missiles (Batskiboat): 1 instance
Search: 003C237C00012F12006853790007808A
Change: 003C237C00012F12006860040007808A

Infinite Items (side scrolling stages): 30 instances, change all
Search: 000BFE3770001039000BFE3653320000
Change: 000BFE3770001039000BFE3660020000

Infinite Health (side scrolling stages): 6 instances, change all
Search: 00440C390006000BFE52670000380C39
Change: 00440C3900066002FE52670000380C39

Invulnerable (after 1st hit-side scrolling stages): 6 instances, change all
Search: 4A39000BFE4F6700000E5339000BFE4F
Change: 4A39000BFE4F6700000E6004000BFE4F

Infinite Lives (side scrolling stages): 6 instances, change all
Search: 0007000BFE52670000265339000BFE35
Change: 0007000BFE52670000266006000BFE35

[Saturn025]

Annet Futatabi

Infinite Health: 9 instances, change all
Search: FD127600363900FF40A8977900FF40AC
Change: FD127600600400FF40A8977900FF40AC

Infinite Special Attack (refills almost instantly-still none at bosses): 9 instances, change all
Search: 00044E75427900FF4114527900FF40AE
Change: 00044E75427900FF4114600200FF40AE

[Saturn025]

Incase no one saw my edits above




Edit:
I have these on my site, updated as follows. Please let me know if you see any questionable edits
999 Rings After Taking A Hit (must have at least 1) (Edited to hopefully reflect proper ASM hacking)
Search: 4442444451CDFF4433FC000000FF1512
Change: 4442444451CDFF4433FC03E700FF1512
73 instances, change all

Infinite Lives (Edited to hopefully reflect proper ASM hacking)
Search: 00FF1510523900FF150E533900FF1508
Change: 00FF1510523900FF150E600400FF1508
73 instances, change all

Stop Time Increase (side scrolling stages): 73 instances, change all (Edited to hopefully reflect proper ASM hacking)
Search: 00093B3B670000E04A38F7CC66245221
Change: 00093B3B670000E06002F7CC66245221

Stop Countdown On Bonus Stages: 1 instance
Search: E319663C4A390003E318663453B88026
Change: E319663C4A390003E318600453B88026

Never Lose Rings In Bonus Stage: 1 instance
Search: 6100CEA6303880243200E24831C08024
Change: 6100CEA6303880243200600231C08024

Infinite Air: 11 instances, replace all (Edited to hopefully reflect proper ASM hacking)
Search: 0033003208E800070036537900FF150A
Change: 0033003208E800070036600400FF150A

This one is superseded by the 999 rings one but leaving here in case the other is overkill lol (don't use together)
Never Lose Rings When Hit (must have at least 1) (Edited to hopefully reflect proper ASM hacking)
Search: 4442444451CDFF4433FC000000FF1512
Change: 4442444451CDFF446004000000FF1512
(or 6006 as shown here)
73 instances, change all


Edit: Found more

Infinite Bubble Shield for the rest of the stage or death (once picked up): 52 instances, change all
Search: 000C000C4228002A08B9000000FF151E
Change: 000C000C4228002A6004000000FF151E

Infinite Invincibility (Stardust) for the rest of the stage or death (once picked up): 73 instances, change all
Search: 00FF151F673C4A680032673653680032
Change: 00FF151F673C4A680032600453680032

Edit: One more

Infinite Speed Shoes for the rest of the stage or death (once picked up): 70 instances, change all
Search: 00FF1520674E4A680034674853680034
Change: 00FF1520674E4A680034674860020034

[Saturn025]

Thanks for pointing that out Tony
As always, I was taking shots in the dark with some of those. Iirc, I'd tried 6004 in place of 5339 and the emu crashed. After re-searching to find the string I pounced on whatever would work lol.
Made it to the end of the game with them but I'll go back and make corrections to the posts.

Found these while playing.

Never Lose Rings In Bonus Stage: 1 instance
Search: 6100CEA6303880243200E24831C08024
Change: 6100CEA6303880243200600231C08024

Infinite Air: 11 instances, replace
Search: 0033003208E800070036537900FF150A
Change: 0033003208E800070036600400FF150A

[Tony H]

Hi Saturn025. Just wanted to point out that most of your Sega CD hacks are incorrect. Here are a couple examples...

On your code/hack for Sonic CD for "Stop time increase":

Search: 00093B3B670000E04A38F7CC66245221
Change: 00093B3B670000E04A38600466245221

The 4A38 right before your hack is a "Test" instruction. It tests the RAM address right after it. Your hack is changing the RAM address from F7CC to 6004. I'm assuming that you wanted to use the "6004" to branch (jump), but instead it's causing the game to test RAM address FF6004. We have no idea what side effects that may cause. The 6004 Branch instruction must always replace another instruction.

One more example...

Your code/hack for Sonic CD infinite lives:

Search: 00FF1510523900FF150E533900FF1508
Change: 00FF1510523900FF150E533960021508

This one has the same problem, but a little different. The "00FF" that you're changing to 6002 is part of a RAM address. Remember, you must use the 6002 branch instruction to replace another instruction. In this case, you'd replace the 5339 with 6004. The 5339 is a subtract instruction. The 6004 would replace the subtract instruction and make it so that it would branch/jump over the RAM address (00FF1508).

68000 assembly can be a little difficult, but hopefully this will help.

[Saturn025]

Patches welcome


Edit: Working on two more Sonic hacks: (Updated 11/16/16)
Stop Time Increase (side scrolling stages): 73 instances, change all (Edited to hopefully reflect proper ASM hacking)
Search: 00093B3B670000E04A38F7CC66245221
Change: 00093B3B670000E06002F7CC66245221

Stop Countdown On Bonus Stages: 1 instance (Edited to hopefully reflect proper ASM hacking)
Search: E319663C4A390003E318663453B88026
Change: E319663C4A390003E318600453B88026

- - - Updated - - -

Here are some for Lords of Thunder. It was awesome blazing through this entire game without a scratch

Lords of Thunder (Updated 11/16/16)

Never Lose Crystals (money): 2 instances, change both
Search: F3A043F900FFF81045F900FFF3A4830A
Change: F3A043F900FFF81045F900FFF3A46004

Top Health Bar Never Decreases: 16 instances, change all
Search: 000700FFF81867000022553900FFF829
Change: 000700FFF81867000022553900FF6004

Bottom Health Bar Never Decreases: 8 instances, change all
Search: 6B0000263C2E00266700001E9D690024
Change: 6B0000263C2E00266700001E60020024

Infinite Special Weapon: 8 instances, change all
Search: 0004FE21660000044E75537900FFF832
Change: 0004FE21660000044E75600A00FFF832

Invulnerability (after 1st hit on regular and boss stages): 8 instances, change all
Search: DAF64E754A6E002267000028536E0022
Change: DAF64E754A6E00226700002860020022



Edit, found more:
Infinite Continues & Continue Time: 1 instance @ 0x0051C4E6
NOTE: Candles will still burn out but timer stops after last one
Search: 67000008533900FFF82E4E75536E0038
Change: 67000008600400FFF82E4E7560020038

Infinite Continues (as a standalone): 1 instance @ 0x0051C4E0
NOTE: Don't use with Infinite Continue Time hack
000200FFF81467000008533900FFF82E
000200FFF81467000008600400FFF82E

Infinite Continue Time (as a standalone): 1 instance @ 0x0051C4E6
NOTE: Don't use with Infinite Continues hack
NOTE: Candles will still burn out but timer stops after last one
67000008533900FFF82E4E75536E0038
67000008533900FFF82E4E7560040038

[MathUser]

If these are patchable then patches would be nice.