- Neptune (Mythology)
- Nest
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- Netherrealm War
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- Nexus (Gears of War)
- Nguruvilu
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- Nidoran ♂
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- Nightwalker
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- Noskov
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- Odin
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- Ogroman
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- Operation: Javier
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- Orcus
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- Orthus
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- Oswald A. Lisker
- Osyluth
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- Otis & Clay
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- Outer God
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- Outworld Invasion of Earthrealm
- Outworld Tournament
- Overflow
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- Pafumon
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- Pan
- Panadyne
- Pandia
- Pandora (Malifaux)
- Paomon
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- Parasite Cage
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- Patrick
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- Pedro Fernandez
- Pegasus
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- Pepo
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- Perses
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- Peter
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- Phillip Channard
- Phoebe
- Phoenix
- Phoenix (Harry Potter)
- Phoner
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- Pinhead
- Pink Agaricus
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- Piranhacus Giganticus
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- Pixie
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- Planet X
- Planetar
- Plant 42
- Plant 43
- Plasma Bug
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- Plax
- Pleiades
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- Pluto (Resident Evil)
- Plutus
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- Poison Zombie (RE2make)
- Pokémon
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- Poltergeist (Malifaux)
- Polyhymnia
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- Pyron
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- Q
- Q (Q- The Winged Serpent)
- Q (Species)
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- Raccoon City Destruction Incident
- Rachel (Nightbreed)
- Rachel Foley
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- Ralph (Rampage movie)
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- Randall Boggs
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- Rangifer
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- Raphael LaCroix
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- Rattata
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- Raven
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- Redneck Gator
- Regenerador
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