So a quick list of what will work and won’t in 2D for RAIN:
AI - partially works
— BasicMemory - works
— BasicMind - works, move node won’t work unless motor is replaced
— BasicMotor - won’t work in 2D, would need to be replaced
— BasicNavigator - won’t work in 2D, would need to be replaced
— BasicSenses - sensors work except for line of sight which uses the 3D raycast
Entity - works
Waypoints - works, but won’t be useful unless motor is replaced
Navigation Targets - works, but won’t be useful unless motor is replaced
Navigation Mesh - won’t work, doesn’t pick up 2D colliders
As for replacing the motor and navigator, I haven’t attempted this just yet, I’m not sure what I would do for navigation in fact. A 2D physics motor seems straight forward, but I’m not sure I can put one together right now. Perhaps someone else has created one at this point though.