Robot Unicorn Attack is an online "endless running" video game featured on the Adult Swim and Flashline Games website. The game was produced by Spiritonin Media Games and was released in February 4, 2010. The game's soundtrack is the 1994 song "Always," by the British band Erasure, in its "2009 mix" version.
With one million plays within the first week of its release, Robot Unicorn Attack is one of the most popular and most played games featured on Adult Swim. As a result of its popularity, Adult Swim has made official merchandise for the game, and has released it on the App Store and Google Play. Adult Swim released three followups to Robot Unicorn Attack, subtitled Heavy Metal, Christmas Edition, and Evolution respectively.
A sequel titled Robot Unicorn Attack 2 was developed by PikPok and released on iOS on April 25, 2013, and Android on July 12, 2013.