Quarrel is a video game developed by Denki and published by UTV Ignition Entertainment. It is a word-based strategy game, described as "Scrabble x Risk x Countdown."
In Quarrel, the aim of the game is to take all the territory from the other players (up to four). To do this, the player 'invades' neighboring territory and then must make a higher-scoring word than his or her opponent.
Source: Wikipedia, "Quarrel (video game)", available under the CC-BY-SA License.