As the thread linked above mentions, there is a weird way to enable the gore mode through a particularly difficult button combination. There is also the option to use an existing NVRAM file which has the option already enabled, with the caveat of overriding your own settings, stats, scores, etc.
It would be nice if someone could find the instructions in the actual binaries so that it could be always enabled by default; anyway, for lack of a better option, if you want to modify your own NVRAM file, it is fairly easy.
Enable gore (red blood)
- Quit Retroarch;
- Locate your NVRAM file (ex:
mslug6.zip.nvmem
, typically inside Retroarch’s saves\reicast
);
- Make a backup of the file before touching it;
- Open the original NVRAM file with an hex-editor and replace the bytes in the following offsets with the corresponding bytes indicated here:
0x87: F0
0x94-0x9B: 35 E5 50 6E AB 66 8A F1
0xA0-0xA3: 46 84 62 8B
0xC4-0xC8: C4 5E 4D 9B 05
0x2035: 01
At this point, you should be good, just save the file and run the game. If by any chance you want to change the language and region, but for whatever reason don’t want to enter the service menu, you can preset it here too; process is the same:
Set region/language (N.A./English)
0x241-0x242: 01 01
0x248-0x24B: C3 D4 E0 F2
Below is a screenshot of what the gore option edits should look like in the NVRAM file (offset 0x2035
is elsewhere):