Tyranny also had the “hot-links” in conversations that you could hover over and the game would show you the lore about the person or place. It would even show how you reacted in your prior dealings with an NPC. If that wasn’t cool enough, during a dialog with Voices of Nerat he began talking to you telepathically through the hot-link system! It was so cool.
Tyranny also has the best spell system I’ve ever seen where instead of learning spells you find spell “components” that let you alter the effects of spells to make them more powerful, with a higher stat requirement. Building custom spells out of components was awesome.
Tyranny may also have more branching paths than any RPG I’ve ever played. It’s not just that it has five or so different endings, it’s the about the many different paths you can take through the game. It’s incredibly varied for such a story rich RPG.
In short, it’s awesome and way better than PoE1.