"One Step Closer" is a song by the American rock band Linkin Park. It was released as the first single and second track of their debut album, Hybrid Theory. This song is also featured in the music video game Rock Band 2.
The track was originally known as "Plaster", a supposed demo version of "One Step Closer". It found its way to the internet in 2008.
A remixed version of the song titled "1stp Klosr" was featured on Linkin Park's remix album Reanimation. (wiki)