- The Giant Metal Habitat was released on April 29, 2013 along with the other giant habitats for the basic elements.
- Initially, the Giant Metal Habitat had a building time of 18 hours.
- On November 30, 2013, the Giant Metal Habitat, was listed on sale at a reduced price for a limited period of time.
- The Giant Metal Habitat's sale ended approximately one hour later when the price rose from 12 to 25 gems.
- "Tull Caverns", mentioned in the description, may be a tongue-in-cheek reference to Jethro Tull, the band who won the 1988 Grammy Award for Best Hard Rock/Metal Performance.