Play any type of Game at Y8.com. The biggest Game Collection to play free online. Flash, Unity 3D, Html5, Android, Java and Shockwave.
If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
The player has to shoot different aliens to proceed to next levels. Shooting a wrong alien deducts a life. The alien ,that should shot changes in few seconds.
Use mouse to aim and shoot.