Earth Squad

Description
It is the year 2018. Earth is being invaded by aliens. Man kind is almost defeat, the last survivors have withdrawn to sparsely settled areas. In order to defend themselves, they have built remote defence systems. You take control of the systems for one post.
The game is about shouting down waves of alien ships with your cannon. The cannon is control via mouse and can be turned around 360 degree and raised upwards to a certain angle. Enemy ships will come from all sides. A radar map shows the positions of all enemy ships. Incoming attacks are announced with an alarm and a highlight on the radar map.