Make your way to the character select screen, and press the Select button twice (on emulators, the Select button should be the same as the Coin button).Īll being well, the debug menu should appear!.

You may need to reset once it is turned on for the game to properly activate it or you can disable the 'Auto Run Game' option and tick it then, saving yourself the hassle of resetting.

Now turn 'Developer Mode' on (in Kawaks, at least - I don't know the procedure for other emulators or the real hardware).

Load up any Neo Geo Metal Slug game (except for the first) in console/AES mode.

With the debug BIOS installed, you should be ready to go. and if that doesn't work, just throw every single BIOS file you can find into 'neogeo.zip'. If so, try using the Universe BIOS (or 'unibios'). However, some emulators have a hard time recognising the debug BIOS. The two should be placed in the same folder (preferrably the '/roms' folder), and should not be unzipped. You'll already need the 'neogeo.zip' BIOS to run games in the first place, but the 'debugbios.zip' BIOS is required to properly access these features. Search sites like Console Passion if that's what you fancy.įor emulators, the BIOS is a. On the real Neo Geo hardware, this entails replacing the BIOS chip with a modified one, which requires a soldering iron and the possible risk of futzing up your console, so tread carefully. To access any of these debug options in Metal Slug 2 through 5, you will need a Neo Geo Debug BIOS. The debug menu is where the magic happens! If it weren't for this (and the tile viewer, I suppose), we wouldn't have access to most of the unused rubbish hidden inside the games.

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