A type of warfare that you have never seen
User Rating: 10 | Sins of a Solar Empire: Diplomacy PC
1. Gameplay - A lot of new features has been added to the game, and the most important among them being the Relationship Bar. It is a measure of your relation with other players. So donating resources, being part of the same race, envoys, helps to increase the relationship. Similarly, military actions, different races, adjacent territories decreases the relationship status. Also 2 new features are Envoys and Missions. Envoys are special cruisers that can be deployed to improve relations. They are granted temporary invulnerability from foes called Diplomatic Immunity. They can be sent to foreign planets to improve relation with that planet. Similarly, players with whom you have a good relation can be issued missions. These missions do you cost, but they do come in handy. However, you can't issue mission to players against their allies.
2. Story - Well the story is pretty fuzzy. It seems that after constant battles, all the races felt it was necessary to stop the battles, and take a different tack - Diplomacy.
3. Music and Sound Effect - Not much changed here. And for the better
4. Graphics - Same goes for this as well.
A must have expansion for anyone. 
