A simple game wit hidden depths, a solid upgrade structure and very pleasing if you are into old school pixel art. It is in essence a simpler (and then again, not so simple) version of chess. You have 3 pieces to start with (artillary, a tank and a "boxer" mech) and have to defend a set number of territories and islands against attacking aliens. There are many different ways to up the difficulty, and therefore enough challenge is present to gaurantee multiple replays - a time travel mechanic makes this make sense in-universe. Not that time consuming, enough fun to warrant the investment, I can recommend "Into the breach" for any fan of games like Commandos, Civilization and Starcraft. Low tech, high fun!