The ball encounter is a FPS tower defence game, which is different from traditional FPS game within gun, and replaced with staff and sword. It does not need too much strategies to do the defence like normal tower defence game, as a capable defencer need to keep the mind and fingers stay sharp. The scene and play mode design have been optimized as simple as possible, in order to improve the experience of immersion. Unprecedented tension and pressure: the enermy balls will spawn from all directions, so we must to be observant and alert. The strategy of skills: in this game, we can use 2 weapon modes and 6 powerful skills to engage with the enermy balls. Interaction with scene: there are 3 different types defence towers that can assist us to attack the enermy balls, also we can use a specific skill to reinforce the tower. Fine graphics: good connection between realistic rendering and magic style design, meantime fantasic VFX brings cinematic enjoyment.