Default Controls
← → ↑ ↓ = Directions
Z = A, X = B
A = X, S = Y
D = L, C = R
Enter (↵) = Start
Shift = Select
About the Alien Syndrome (USA) (Unl) Nintendo Entertainment System (NES) Online Game
Alien Syndrome is a classic NES game where you can battle against hordes of alien creatures. You can now play this exciting game online in your browser for free. Get ready to explore different levels, save your comrades, and defeat the alien bosses. Simply click the play button and start your alien-blasting adventure right away. No need to download anything, just jump in and enjoy the retro gaming fun!
