In Chicken Invaders, you must advance through waves of chicken invaders by shooting them with your laser as you try to avoid the eggs. Whenever a chicken is destroyed, a chicken leg flies down. Collect these for missile bonuses. Gift boxes are hidden in some chickens and asteroids, and will upgrade the power of your primary laser. Overall, I really like this game, especially because not all levels have the traditional 'Space Invaders' movement, where they go side to side and down. For example, chickens can fly around the earth as you shoot at them (look at the screenshot). This is an awesome game and is worth checking out.