Unity3D and Multiagent Systems:
1. My Master student Felix Ruzolli and I have implemented a 3D airport passenger simulation in Unity3D in 2013:
2. My Master student Jan Mortensen integrated my emotion simulation architecture WASABI in the 3D airport passenger simulation in Unity3D in 2014:
WASABI's UPD interface is used to connect it with Unity3D bidirectionally. The emotions of 500 agents are simulated with an update once per second from WASABI to Unity3D. The opposite direction is updated asynchronously with valenced impulses, triggers, and changing the dominance values of single agents. Check this for some background information on how WASABI works.