Ruiner may refer to:
Video games
Ruiner (video game), a 2017 shooter video game Ruiner Pinball, a 1995 pinball video game
Music
Ruiner (band), an American hardcore punk band Ruiner (A Wilhelm Scream album), 2005 Ruiner (Nothing,Nowhere album), 2018 "Ruiner", a song by Nine Inch Nails from The Downward Spiral