Default Controls
← → ↑ ↓ = Directions
A = Z
B = X
Mode = Right Shift
Start = Enter
About the SDI (Japan) SEGA Master System (PSX) Online Game
Hey there! Welcome to play the SEGA Master System game SDI (Japan) online for free in your browser. In this game, you’ll pilot a powerful fighter jet to defend Earth from alien invaders. Blast through waves of enemy ships and giant bosses to save the planet. No need to download anything, just click and play. Enjoy the classic arcade action of SDI (Japan) wherever you are. Get ready to show off your skills and achieve the high score!