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<h1>Behavioral Patterns</h1>
<h1 class="book"><a href="/">Game Programming Patterns</a></h1>
<p>Once you&#8217;ve built your game&#8217;s set and festooned it with actors and props, all
that remains is to start the scene. For this, you need behavior&#8202;&mdash;&#8202;the
screenplay that tells each entity in your game what to do.</p>
<p>Of course all code is &#8220;behavior&#8221;, and all software is defining behavior, but
what&#8217;s different about games is often the <em>breadth</em> of it that you have to
implement. While your word processor may have a long list of features, it pales
in comparison with the number of inhabitants, items, and quests in your average
role-playing game.</p>
<p>The patterns in this chapter help to quickly define and refine a large quantity of
maintainable behavior. <a href="type-object.html">Type Objects</a> create
categories of behavior without the rigidity of defining an actual class. A
<a href="subclass-sandbox.html">Subclass Sandbox</a> gives you a safe set of primitives
you can use to define a variety of behaviors. The most advanced option is
<a href="bytecode.html">Bytecode</a>, which moves behavior out of code entirely and into
data.</p>
<h2><a href="#the-patterns" name="the-patterns">The Patterns</a></h2>
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<li><a href="type-object.html">Type Object</a></li>
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