Default Controls
← → ↑ ↓ = Directions
A = Z
B = X
Mode = Right Shift
Start = Enter
About the Alien Syndrome (USA, Europe) SEGA Master System (PSX) Online Game
Hey there! Welcome to play “Alien Syndrome” online for free in your browser. Get ready for some intense action as you battle your way through hordes of alien creatures to save your fellow humans. Use various weapons and power-ups to survive the onslaught and rescue the hostages. Can you make it out alive? Click the link and start playing now!