There are lots of types of treaties as well, an EXTREMELY diverse negotiation system is in the game. You actually travel through the systems, and can form strategies with a variety of equipment that can be used like anti-ship drones, minefields, fighters, ships that can build things like space stations in open space (like on your side of a wormhole). Unlike other games like Master of Orion you control the ships inside of the star systems throughout the game and travel to new systems using wormholes, similar to what is used in a few space strategy games or even maybe Babylon 5. There is also a crystaline tech tree, psychic, temporal, and religious, which all of their own unique abilities. Like, for example, you can have a organic tech tree that includes regenerating armor and ships, special weapons, and special planet structures that are used for a variety of things. There are lots of customization options for races, and special race specific tech trees you can select for race generation. which is definately an interesting concept for this type of game. You can destroy stars, planets, create black holes, nebula, create star systems from nebula.

There are also lots of technologies for manipulating space, like you can build planets and 'ringworlds' and 'dyson spheres' if you get far enough in the game. There are controllable battles, for one, so there is a large variety of special technologies that aren't just weapons and defenses for combat you can use for ships like there was in Master of Orion games. It has a lot of great ideas and concepts, and there is a lot more to do in this game than in Galciv. I'm going to explain this game in detail if you have not played it. Their game allows pretty much freeform modding like Galciv 2 does but even more.

This is one game I like, the only thing I have against it is that the AI isn't that great but modders are making it gradually better.

Space empires v mods