건앤마스크 is a free Android game developed by tnkplay. The game is an action-packed FPS where you have to defeat terrorists disguised as animals who are occupying various locations in the city. The game is easy to play, and the objective is to upgrade your weapons and defeat the terrorists.

The game has a simple and straightforward gameplay mechanics, where you only need to aim, and the gun will automatically shoot. You can purchase various weapons to defeat stronger terrorists.

The game's difficulty increases as you progress, with normal, hard, and hell modes. The game is suitable for anyone who wants to enjoy a simple yet engaging FPS game.