Where do you download metal slug 3 for the PC and for free

There are many sites around the web with roms (games made for other systems, but put onto the computer). An old website, that was really big a while back was Romworld.com, if that doesn't work, I suggest just searching Metal slug 3 rom download. -many roms are made after old Nintendo games, that are long gone and forgotten, such as the original Super Smash Bros, Street fighter, ETC.

REMEMBER, THEY CAN COME WITH BUGS AND VIRUSES, SO BE CAREFUL WHEN USING ROMS!,