LP Underground XIV, often known as LP Underground 14.0 and LPU XIV (stylized as LINKIN PARK UNDERGROUND XIV on the cover of the album), is a CD and digital download set released on November 20, 2014 by Linkin Park Underground. The demo album is the sixth by the fan club. This is one of the demo albums that was released per year by the LP Underground.

The CD for LP Underground XIV was released on November 20, 2014 via Machine Shop, after the launch on the Linkin Park Underground official website. It was globally launched on November 14, 2014 at Berlin. It was declared at the opening of the Linkin Park Pop-up store. It was officially released during the LPU Meetup in Berlin at the Hard Rock Cafe. The album contains unreleased demos spanning the entire career of Linkin Park, including the original 2002 demo of the hit single "Breaking the Habit" with Mike Shinoda (who also produced this EP) on lead vocals during the recording sessions of Meteora, and a 2009 beat written by the band's bass guitarist and turntab