Reversal Challenge is a puzzle video game for the Nintendo DS, designed to test the player's problem-solving skills. The game presents a series of brain-teasing challenges that require careful thought to reverse certain elements and achieve a particular outcome. Released in the mid-2000s, Reversal Challenge combines a simple interface with increasingly complex puzzles, making it appealing for players who enjoy strategy and logic games. The title is indicative of the gameplay, where reversing the state of play is often the key to success.