Alex Kidd In Shinobi World ROM Download for Sega Master System (Sega Master) on Emulator Games. Play Alex Kidd In Shinobi World game that is available in the United States of America (USA) version only on this website. Alex Kidd In Shinobi World is a Sega Master System emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Alex Kidd In Miracle World, Shinobi and Alex Kidd In High Tech World as shown below. Alex Kidd In Shinobi World works on all your devices in high quality.