House didn't get much darker in the 90s than what Underground Sound of Lisbon produced. Portugal's Rui Da Silva and DJ Vibe had a major hit with "So Get Up" on Tribal America in 1994 which made them superstars in the tribal scene.
Later they produced this for the 'We Are Twisted' compilation promo pack. It was their last record together so far as I know.
Underground Sound Of Lisbon - African Dream
Underground Sound Of Lisbon - African Dream > Discogs