The HTN Planning plugin lets you create AI that predicts consequences of its actions and plans multiple steps ahead. Here are some examples:

• Video: an HTN-based character inventing the optimal plan to attack a target
• Video: two groups of HTN-based characters tactically fighting in a simple FPS arena

Just like with Behavior Trees, you can easily create Tasks, Decorators, and Services from either C++ or Blueprints, and arrange them in a visual graph editor. Easily use the Blackboard to store knowledge about possible futures and modify it from within graph nodes. The planner efficiently finds the plan with the lowest cost, or the one with the highest priority.

Compared to other planning techniques like Goal-Oriented Action Planning, HTN planning is more efficient and gives designers much more control over the AI. You can create AI with just as much autonomy and flexibility as you need.

Features:

• Node-based HTN graph editor
• Seamlessly use Blackboard data as worldstate
• Make custom Tasks, Decorators, and Services in both C++ and Blueprints
• Cost-based or priority-based planning.
• Parallel planning
• Any-order planning
• Visualize the current plan of any AI via the Visual Logger
• Integration with the Environment Query System for complex movement planning and decision-making
• Realtime debugging features

For more info, check out the documentation website, the tutorials, and the official Discord community.