The game really shines in multiplayer.
Me and a friend had to make 3 different attempts to beat the computers when it was on its hardest mode. Eventually, one of us was responsible for military and the other for infrastructure.
Infrastructure is easy, until they start lobbing nukes.
We had a 2 hour battle of attrition at one point. Our infrastructure was maxed out, so I was just watching. We honestly must have killed like 300 units just trying to create a beach head. Then I decided I would help him and built a city right on the coast. The computer then took it, their boundaries expanded and they had their beach head. Took another hour to blow the computer off our island.
Damn good fun.