An apparatus and method for a game of play for use in a casino establishment, or on a general purpose computing device for offering games with multiple outcomes and including blockading game elements or symbols. A base game, or an outcome on a base game that triggers a sub-game or a bonus game involves forming winning combinations from combinations of symbols in a matrix using only accessible symbol positions. Achieving winning combinations of symbols among accessible symbols results in awards to players. The apparatus and method are offered on electronic gaming machines such as slot machines and video poker machines, but may also be deployed on other devices such as on a general purpose computing device or mobile phone in stand-alone form or connected to a network, such as the internet.