Blockade is an arcade video game developed by Lane Hauck for Gremlin and released in November 1976. It is a two-player game where each player controls the direction of an arrow on the screen which creates a trail behind it. The object is the avoid any walls surrounding the playfield or created by each player for a select amount of turns. Blockade spawned many clones which came to be known as snake games.

Gremlin Industries was an American arcade game manufacturer active from 1970 to 1983, based in San Diego, California. It was acquired by Sega in 1978, and afterwards was known as Gremlin/Sega or Sega/Gremlin. Among Sega/Gremlin's most notable games are Blockade and Head On, as well as being the North American distributors for Frogger and Zaxxon. The company's name was subsequently changed to Sega Electronics in 1982, before its operations were closed in 1983.