Endorfun is a single-player puzzle computer game developed by Onesong Partners and released by Time Warner Interactive in 1995 for Microsoft Windows and Macintosh.

If the timer expires or the light body is unable to move (all adjacent grid spaces are blocked by coloured tiles) then the game is over.

Endorfun features phrases described by the press at the time of its release as "subliminal messages", which are audibly spoken through speakers or headphones to the player during gameplay.

They became immediately controversial due to their nature and were criticized by the press and a professor at the University of Michigan, who raised concerns that these messages, though ostensibly positive, could have certain unintended consequences.

He added that the "abstract symphony of mesmerising graphics, colorful motion, and swelling, jazzy background tunes soon puts the player in that autopilot gaming state where complex movement sequences and on-the-fly strategies becomes second nature and all is forgotten but the rhythm."