A free app for Android, by GX Studio.

Lone Tower is a free, idle tower defense game that combines the elements of a Roguelike with an Idle game. The gameplay is very easy to pick up and play. You can do all the things you’re expected to do in a Roguelike game, such as exploring and fighting against monsters. But instead of battling against other players, you’re battling against the enemies of the world, and your goal is to survive as long as possible.

The game is very simple and easy to play. All you have to do is click on the screen to move your tower or click on the button on the bottom of the screen to shoot your current monster. When you defeat a monster, you’ll get a reward. This reward can be used to unlock new towers, upgrades, or abilities.