EDIT: Since I wrote this review, Mini Metro added a lot of settings (including audio!!!), a "Daily Challenge Mode", and a lot of other neat things! My recommendation still stands, just beware that some of the information is a bit dated.

When I first got Mini Metro, I assumed it'd be similar to games like Train Simulator, or SimCity. And it is, to a certain extent. But it also isn't. Mini Metro is packed with a very minimal design, a beautiful colour scheme, and a very intuitive interface. It just looks... smooth. It opts for a very clean, non-distractive interface, which is welcoming for a casual game to play.

The gameplay is stellar. While it doesn't reach levels of complexity that Train Simulator will have, it emulates a very tough, decision making game, while still keeping its casual feel. You plan out the metro system for a variety of cities, with each city having its own characteristics (for example, Osaka features the Shinkansen, or the Bullet Train). You struggle to make sure none of your stations overflow, and at the same time make sure that everybody gets where they want to. You are restricted in the amount of trains, lines, and tunnels you have, creating a level of depth most casual games don't hold.

My only critique of the game is the lack of information and music/audio, but it's Early Access! For what it is, especially its price, Mini Metro is one of the best Early Access games I've come across. I've bought the game to support the developer, and watch the game evolve, and boy, sure it has. Updates are pushed regularily, and bugs are fixed.

Mini Metro is one of those games that looks simple on the surface, but has layers of complexity, while keeping its casual style. I would recommend it to anybody who wants a game to sink 20 minutes in, and have fun while using their brain!