From the back of the Box:
Blokus, the Cornerstone of Strategy
400 Squares, up to 4 opponents and 84 playing pieces makes Blokus the ultimate in exciting strategy games. In Blokus every move counts, every piece a different shape and every game unique. Claim territory, 'blok' your opponent and like most games it's all about winning.
Strategy's the aim, Blokus the game?