Tyranny is underrated. It was incredibly ambitious, with an actually dynamic story, and inventive story and gameplay elements.
It was very flawed, partially because of the engine I believe (it doesn't allow large maps at all), but it held so much promise!
I feel like the ideas it introduced have never been exploited fully.

It's definitely worth a play.

Only real complaint is that the last half of the game feels a bit rushed and it seems to setup for a sequel that may or may not ever come.