LEGO Rock Raiders was a theme that was released in 1999 and was based on space miners trapped on an alien planet. The theme was made up of eight main sets and four promotional sets as well as three minifigures sets. The Rock Raiders theme was discontinued in 2000. The theme had several elements that were reprized in the Power Miners theme ten years later.
2000 LEGO Sets
The turn of the millennium was an important year for LEGO. Not only did LEGO produce some investible sets for 2000, we saw some transition in the company. First, set designer and the inventor of the minifigure, Jens Nygaard Knudsen, retired from The LEGO Group. Second, The British Association of Toy Retailers name the LEGO brick "Toy of the Century". With 2000 LEGO released just a couple of new themes including TECHNIC Roboriders and Race. The Rock Raiders, Nijna and the Slizer/Throwbots themes were discontinued.