Metal Slug 4 game is a ROM you can play online within your browser. This SNK Neo Geo ROM runs in our top-notch quality emulator at PlayRoms.net only. Play Metal Slug 4 NEO-GEO game online in English USA version on your desktop, tablet, and mobile. If you liked playing this emulator then you will also be interested in similar classic titles Metal Slug and Metal Gear. This free game belongs to the Skill and Shooting category of online retro games.