MiSTer FPGA Forum

Load the game as normal
Press Start+A+B+C together to get Unibios Menu
Select Soft Reboot System, immediately Press B+C+D together to get the DIP menu
Select Setting up the Soft DIP
Turn Blood on
Exit out back to the game

It also works in Shock Troopers but it's called violence not blood

Aspie wrote: ↑Thu Oct 15, 2020 12:38 am it's called violence not blood

"We can't give you love and rhetoric without the blood. Blood is compulsory."

Thanks for the tip!

Sweet. Now I have more excuses for yet another play through.

Here’s what works for my on IPAC4:

1) Load the mslug ROM, then hit F12. Ensure SystemType: Arcade(MVS) and BIOS: UniBIOS
2) Also, ensure you’ve configured your preferred controls via ‘Define NEOGEO buttons’ in the System menu.
3) Do a soft reset/reboot of the ROM (I use my ‘User’ button on my I/O Board).
4) As soon as you see the NEO-GEO ‘The Universe NIOS v4.0 splash screen, press and hold A+B+C, this takes you to the ‘NEO*GEO Universe NIOS 4.0 by Razoola’ menu. From here, select the ‘Region Setup’ with the A button. Follow onscreen instructions to select your region (USA) and the mode (Arcade). Hit the C button to exit.
5) Now, do a second soft reset/reboot of the ROM (I use my ‘User’ button on my I/O Board). As soon as you see the ‘NEO-GEO The Universe BIOS v4.0’ splash screen, press and hold B+C+D buttons until you see the UNI-BIOS v4.0 options screen. Select the ‘Setting Up The Soft Dip’ option and hit A. Select ‘SLOT1 Metal Slug’ and hit A. Select the Blood option and turn on by hitting A. Just hit the C button twice to get back to the UNI-BIOS v4.0 options screen, select EXIT and hit A. You’re done!

NOTE: If you want your settings saved so you don’t have to do this every time you launch this ROM, hit F12 to bring up the NEOGEO settings and ensure ‘Autosave’ is set to ON.