Bases Loaded 4 ROM Download for Nintendo (NES) on Emulator Games. Play Bases Loaded 4 game that is available in the United States of America (USA) version only on this website. Bases Loaded 4 is a Nintendo emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Bases Loaded, Bases Loaded 2 and Bases Loaded 3 as shown below. Bases Loaded 4 works on all your devices in high quality.