A free app for Android, by Li ZiQi.
“Guardian: COF is a real-time online free-action game. It is set in a magical mechanical world, where a mysterious spirit gives powers to those who possess it. You will be able to rule the world and create an army, fight against your enemies and enjoy the mini games.
You can get tons of diamonds and upgrade materials. The mini games are not just for fun, but they also help you get experience points. It is a MMORPG, which means you can play it online and enjoy your journey with friends.
In the game, you will experience the following: