In the Diplomacy micro-expansion, Envoy Cruisers expanded the diplomacy aspect. In the Entrenchment micro-expansion, Starbases are the largest and most powerful military structures, but are extremely expensive, while Anti-Structure Cruisers provide the firepower to counter Starbases, and Mines change the shape of the battlefield. Capital Ships were the largest and most powerful ships, until the addition of Titans, but are very expensive they can be upgraded in level with a maximum level of 10, making them superior to all vessels within their respective fleet. Cruisers are larger than frigates and perform more specific roles such as carrying strike craft, supporting fleet operations, or direct heavy assault. Frigates are the most common ships that fulfill a variety of functions from scouting to colonization. Strike Craft are the smallest ships and must be carried into battle by larger ships.
There are six main types of ships in Sins of a Solar Empire.
