Description: Unknown balloons force is invading your country, take control of a 88 mm flak and take them down. Balloon Invasion is a defense where you defense against enemy balloons passing through the screen. Use mouse button to aim and hold down left button to fire. Remember not to multi click on the mouse button, it would not work that way, it is a thoughtful function to keep you from breaking your finger. The game start off easy and eventually gets tough in later stage. Enemy will fire at your flak, if it is destroyed, the battle is lost. You gain points by destroying enemy units, you can spend this point on raid airs to help you to clear out the sky or you can spend it on upgrading your structures. You can then place this buildings on the field to gain additional support. Do not keep using air raids if it is not necessary, each time you used makes the next call more expensive. Use it wisely. After you completed a mission, you can select the next mission on the map, you can scroll the map by moving your mouse to the edge of the screen. Balloon Invasion is a great looking free games developed by game in a bottle. The game was designed with amazing details with a deep gameplay.