Compared are the R-Rated Version and the Unrated Version, both availabe on the German DVD by Retrofilm.

The R-Rated lacks 3 scenes with a total length of 21 seconds.

The solid 80s horror flick "Slaughterhouse Rock" was one of the movies of which the uncensored Unrated Version was very rare because it was only available in the Netherlands on VHS. In the US, only the regular R-Rated Version which lacks 3 scenes is available. In other countries like the UK or Germany, it was even worse. That is until the beginning of 2013 when the label Retrofilm released the uncensored Unrated Version on DVD (the R-Rated Version is available, too) which has been used for the following comparison.

17 Min
Additional shot of the demon ripping out Alex's guts.
1 sec

28 Min
The demon is chewing on a piece of flesh he cut out of Alex's body.
2 sec

35 Min
When the group keeps walking to the jail, Richard stops and makes a joke. He tells the others it was really amazing plus his skin would at least stay wet that way. Carolyn is annoyed and asks if he couldn't get better friends. Richard tells her not to wrack her brains. After that comment, he keeps walking with the others.
18 sec