The way the Ratchet & Clank wiki capitalizes words has changed; therefore, this article should be checked, and, if necessary, capitalization should be fixed.
Obsidian was a substance in the Ratchet & Clank universe.
- Ratchet: Deadlocked (first appearance)
- Ratchet & Clank Future: Tools of Destruction
- Ratchet & Clank Future: Quest For Booty
- Ratchet & Clank Future: A Crack in Time