Qix

Qix is a classic arcade game released in 1981. The objective of the game is to claim a majority of the playfield by drawing lines around it while avoiding enemy creatures. The player controls a marker that can move around the edges of the playing field, and can draw lines to create closed shapes. Completing a shape claims that area of the playfield, but if the marker is touched by an enemy creature before the shape is complete, the player loses a life. The game features various power-ups and bonus stages, and becomes progressively more difficult as the player advances through each level. Qix was later ported to the NES in 1991.