Behavior selection algorithm

In artificial intelligence, a behavior selection algorithm,^[1] or action selection algorithm, is an algorithm that selects appropriate behaviors or actions for one or more intelligent agents. In game artificial intelligence, it selects behaviors or actions for one or more non-player characters. Common behavior selection algorithms include:

• Finite-state machines
  • Hierarchical finite-state machines
• Decision trees
• Behavior trees
• Hierarchical task networks
• Hierarchical control systems
• Utility systems
• Dialogue tree (for selecting what to say)