World Warships Combat is probably one of the most download worthy 3D game for android and ios today. It's an action game where the player controls a battle ship fighting against other ships in an open sea. The goal is pretty simple: destroy the enemies before they destroy you. As you progress you will be faced with more formidable enemies equipped with more firepower so you will have to upgrade your own battle ship or purchase a new and more powerful one so you can keep up with your opponents.
This game currently has only one mode which is the single player but it is said that a multiplayer feature will be coming soon which will let you engage other players from all over the world in battle. Anyways, here is my World Warships Combat walkthrough demonstrating gameplays.