The Most Powerful AI Engine on Unity

Introducing RAIN{indie}, a free, ultrafast tool for adding AI character behavior to your Unity project.


RAIN{indie} incorporates the most popular features requested by the Unity community, adds new capabilities, and provides a streamlined process for setting up and working with AI. RAIN{indie} was pre-released to our registered users, already downloaded by hundreds of studios, and is now available on the Unity Asset Store.

Some of the features of RAIN{indie} include:
  • Unity 4, and 3.5 compatibility
  • Support for simple rigging of AI with Behavior Trees, Pathfinding, Movement, and Sensors
  • Use out-of-the-box actions (movement, sensing, animation, and audio) or create your own Custom Actions
  • A Recast-based generator for creating navigation graphs automatically from level geometry
  • Navigation-grid pathfinding and pathfollowing
  • Box and sphere sensors, plus capabilities for tagging detectable objects in your scene
  • Documentation, forums, wiki, and sample projects available at

RAIN{indie} can be downloaded in the ground-breaking mod tool FPS Control from the Tornado Twins, directly from Rival Theory, and on the Unity Asset Store.

To get early releases, and other cool stuff from Rival Theory, register, like or follow us

-Rival Theory
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