Publisher's blurb Each player will control a cursor that moves on the screen in the four cardinal directions; leaving a trailing path as it progresses. The object of the game is to keep your cursor "alive" by not running into one of the developed paths, or the pre-defined boundaries. User summary Blocked was written by David Bohlke and published as type-in source code in A.N.A.L.O.G. 400/800 Magazine ("ANALOG Computing") No. 1, January/February 1981.