Leviathan may refer to:
- Leviathan, a species from Ratchet: Deadlocked.
- The Leviathan, a spaceship from Ratchet & Clank: Up Your Arsenal.
- Arctic Leviathan, a species from Ratchet & Clank: Going Commando.
- Basilisk Leviathan, a species from Ratchet & Clank Future: Tools of Destruction.
- Stellar Leviathan, a species in Ratchet & Clank: All 4 One; originally in A Crack in Time but was cut.
- Leviathan, a fish species All 4 One.
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