A free app for Android, by Brave Beginners.
The gameplay is simple and intuitive, but the depth is immense.
As a new player, you will have access to a dungeon, in which you can explore and fight. You will have to build your defenses and protect the dungeon from intruders. As you do, you will learn more about the different units and their unique traits. You will also learn more about the monsters and the items you can find in the dungeon.
As you explore and fight, you will find a number of artifacts and items. Some of these items will help you in battle, while others can be used as a powerful weapon or tool. You can also find a number of events in the dungeon. These events will help you to learn more about the different units and their traits.