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Rat people are a very special race. Compared with other races, they rely more on their own technology. Their technology is different from the style of medieval dwarves or humans, and closer to the feeling of the industrial age. They use black technology to compete with powerful races such as elves, dragons or ancient lizard people.
The great advantage of rat people in strategy is that they have a certain chance to take the initiative to launch an ambush when attacking. Ambushers can improve the engine rate through skills or techniques. When facing archers or siege machines, they can directly enter the back row through ambush, and the ambush will start immediately, so rats don't have to chase the enemy on the strategic map.