Metal Slug ROM Download for MAME (MAME) on Emulator Games. Play Metal Slug game that is available in the United States of America (USA) version only on this website. Metal Slug is a MAME emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Metal Slug 6, Metal Slug 3 and Metal Slug 3 as shown below. Metal Slug works on all your devices in high quality.