The name of this game is "World of Harry Potter - Reveal & Duel". This game has 2 types of levels - Reveal and Duel. In reveal, the player answers a set of questions and unlocks an object, whose name is to be guessed. While in duel, the player fights against an opponent to win. It is made as a single player game and hence, the player plays both for himself and his opponent. This is a JAVA stand-alone application.