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Unity 5.x Game Development Blueprints by John P. Doran

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Chapter 1. 2D Twin-stick Shooter

The shoot 'em up genre of games is one of the earliest kinds of game. In a shoot 'em up, the player character is a single entity fighting a large number of enemies. They are typically played using a top-down or side-scrolling perspective, which is perfect for 2D games. Shoot 'em up games also exist within many other categories, based upon their design elements.

Elements of a shoot 'em up were first seen in the 1961 Spacewar! game. However, the concept wasn't popularized until 1978 with Space Invaders. The genre was quite popular throughout the 1980s and 1990s and went in many different directions, including bullet hell games, such as the titles of the Touhou Project. The genre has gone through a resurgence in recent ...

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