What are BIOS files and where can I get them?īIOS stands for Basic Input/Output System.
Once you have extracted all the files from nebula225.zip and put them into the folder you made, you will need to get the NeoGeo BIOS files. Note that Metal Slug X is not a new part in the MS story line, it is just an enhanced version of Metal Slug 2.įor Metal Slugs 1-X (1, 2, 3, and X), you are able to use the latest version of Nebula, 2.25, which can be found here: Nebula 2.25 Warning:If you plan on playing Metal Slugs 4 and 5, do not download this version, just continue reading!įor these 4 Metal Slugs, you don't need any DAT files. These 4 Metal Slugs are fairly simple to run. During almost 24 hours, I ran them all (Except 4) in one emulator. I have seen a lot of these posts on problems with running Metal Slug, especially 4 and 5.