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Challenging games provide players with a satisfying sense of accomplishment, the kind that comes from working hard and challenging oneself. They often require tremendous effort and skill to complete, and bring a feeling of joy and achievement when you finally beat the game. At LupyGames.com you can find a wide variety of these games, with themes ranging from puzzle solving, to strategy and arcade experiences. All of our challenging online browser games are sure to captivate and delight.