One of the most classic genres of video games has always been the vertical space shoot-em-up. Space Invaders started it all back in 1978, but many games followed and added their own unique contributions to the genre . One of the most enduring vertical space shooters is Galaga, which you learned about back in the introduction to Hour 9, "A Crash Course in Game Animation." In Galaga, a relentless sequence of invading aliens fly down from the top of the game screen and attack your ship, which is free to move horizontally across the bottom of the screen. The Space Out game that you develop in this hour is similar in some ways to Galaga, although the theme for the game is a little more whimsical. In Space Out, you are the driver of a small green car on a trek across the desert. Whether you believe in UFOs, it's hard to argue that quite a few sightings seem to have occurred in remote desert places such as Roswell, New Mexico. For this reason, your traveler in the game can't seem to get away from a constant onslaught of alien visitors from above. Unfortunately, the aliens in Space Out are bent on putting an end to our traveler's trip. The cast of alien characters in the Space Out game are somewhat comical, and add a degree of whimsy to the game. Following are the three kinds of aliens that appear throughout the game:
Granted, these probably aren't very realistic aliens when it comes to what you might imagine truly encountering in an extra-terrestrial sighting, but this game isn't about reality. Each of the aliens has its own style of attack, and they each fire different missiles. The idea here isn't to simulate a realistic alien invasion, but to have some fun with outlandish characters in the context of a vertical shoot-em-up.
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