HighFleet

This is a really excellent game. At first it just seems like an arcadey shoot-em-up but the longer you play, the more you can appreciate the many layers of strategy. In addition to resource management and fine tuning your ship builds, it becomes important to make strike groups, and command missiles and air wings to keep up with the swarm of missiles and planes sent your way. Even more important is spotting enemies before they see you, and there's robust systems for signals intelligence--radar helps you see other ships, but just like in real life, it also emits signals that can be picked up by someone else! You can also spy on and decode radio transmissions to figure our where enemy ships and transports are going on. The map includes tools like rules and compasses to help you keep track of everything. In general the UI is excellent as it's very "skeumorphic"--the radio interface feels like tuning a radio, etc. The game gets quite challenging the closer you get to Khiva. Garrisons field bigger and better armed ships, heavily armored strike groups supported by missile and aircraft carriers are constantly trying to hunt you down, and repairs and fuel costs start to strain your resources. The game does get a little forgiving about a few things at the normal difficulty: you can retry fights in exchange for a modest morale penalty, you can retry landing in the docks for free, and you can buy and sell things more or less at cost. For some reason there's no option to retry anything when it comes to missile defense, and one unlucky hit can take out an entire ship, but that makes running aircraft really important (so you don't end up trying to intercept the missile where it can actually hit your ships). Overall I was quite sucked in by this game and had a great time with it.