Hi, 
Just wondering if Iray renderer applies for making animations like games?
I'm purely making characters with animations for games so should I need it? 
Does it work - or just for animation movies?

Unity is totally AMD , so forget about iray. you can render using octane , inside unity exists a free version to run inside unity.
but Unity is a full featured realtime engine.. and for sure you dont need things like iray octane or any of this path tracings inside it
unity is powerfull  in render features, and dont need that believe me . ppl like to use path tracing renders inside unity just for bake light
but actualy AMD rays is the best inside unity and i dont ned iray , octane or nothing of this things.