Default Controls
← → ↑ ↓ = Directions
Z = A, X = B
A = X, S = Y
D = L, C = R
Enter (↵) = Start
Shift = Select
About the Alien Syndrome (Japan) Nintendo Entertainment System (NES) Online Game
Alien Syndrome (Japan) is a classic NES game where you battle through hordes of aliens to rescue your fellow humans. Now, you can play this exciting game online for free in your browser. Experience the thrill of classic 8-bit gaming without any downloads or installations. Just click and play to enjoy this retro gem from the comfort of your own home. Get ready to test your skills and save the day in Alien Syndrome (Japan)!