A lot of fun blazing away with machine guns, mini-guns or plasma weapons as you defend your bomber or ground site. First episode is WWII with both aerial and ground segements. Episodes two and three are ground defending against aerial assault only.

The hardest part is in episode three where you're defending against aliens and the weapon changes from rapid fire plasma to twin launch unguided rockets. Hitting fighers is very difficult with those! Too bad there isn't an option to change weapons, plasma cannons are so much more efficient!

Fun shooter!