Question: Atlantica Online is a MORPG set in the mythical land of Atlantis, which was first described by what western philosopher?

Context paragraphs:
Muggiaea atlantica: Muggiaea atlantica is a species of small hydrozoan jellyfish, a siphonophore in the family Diphyidae.  It is a cosmopolitan species occurring in inshore waters of many of the world's oceans, and it has colonised new areas such as the North Sea and the Adriatic Sea.  It is subject to large population swings, and has been held responsible for the death of farmed salmon in Norway.  The species was first described by J.T. Cunningham in 1892 from a specimen obtained at Plymouth, England.

Atlantica Online: Atlantica Online is a free-to-play (F2P) 3D tactical massively multiplayer online role-playing game (MMORPG) developed by NDOORS Corporation.  The game's primary setting is a fantasy-themed alternate history Earth composed of a diverse blend of historical, cultural, allegorical, and mythological elements.  The game world is primarily modeled after real-world geography with accessible locations on six of the seven continents as well as the mythical floating continent of Atlantis from which the game's name is derived.

Etymology of California: California is a place name used by three North American states: in the United States by the state of California, and in Mexico by the states of Baja California and Baja California Sur.  Collectively, these three areas constitute the region formerly referred to as The Californias.  The name "California" is shared by many other places in other parts of the world whose names derive from the original.  The name "California" was applied to the territory now known as the state of California by one or more Spanish explorers in the 16th century and was probably a reference to a mythical land described in a popular novel of the time: "Las Sergas de Esplandián".  Several other origins have been suggested for the word "California", including Spanish, Latin, South Asian, and Aboriginal American origins.  All of these are disputed.

Score (1974 film): Score is a 1974 American adult film directed by Radley Metzger that was one of the first films to explore bisexual relationships.  It was part of the brief porn chic fad in the early 1970s that also included "Behind the Green Door", "The Devil in Miss Jones" and "Deep Throat".  The film was based on an off-Broadway stage play that ran for 23 performances at the Martinique Theatre from October 28 through November 15, 1971 and that featured Sylvester Stallone in a brief role (as telephone repairman Mike).  The theatrical version of "Score" was written by Jerry Douglas, who later became a mainstream screenwriter.  It was set in a shabby Queens tenement, while the film was set in an elegant, mythical land and sported a relatively high budget for an independent film of that era.

Headless men: Various species of mythical headless men were rumored, in antiquity and later, to inhabit remote parts of the world.  They are variously known as akephaloi (Greek ἀκέφαλοι, "headless ones") or Blemmyes (Latin: "Blemmyae" ; ) and described as lacking a head, with their facial features on their chest.  These were at first described as inhabitants of the Nile system (Aethiopia).  Later traditions confined their habitat to a particular island in the Brisone River, or shifted it to India.

Trachylepis tschudii: Trachylepis tschudii is an enigmatic skink, purportedly from Peru.  First described in 1845 on the basis of a single specimen, it may be the same as the Noronha skink ("T. atlantica") from Fernando de Noronha, off northeastern Brazil.  "T. tschudii" represents one of two doubtful records of the otherwise African genus "Trachylepis" on mainland South America; the other is "T. maculata" from Guyana.

Alexander Dalrymple: Alexander Dalrymple FRS (24 July 1737 – 19 June 1808) was a Scottish geographer and the first Hydrographer of the British Admiralty.  He was the main proponent of the theory that there existed a vast undiscovered continent in the South Pacific, Terra Australis Incognita.  He produced thousands of nautical charts, mapping a remarkable number of seas and oceans for the first time, and contributing significantly to the safety of shipping.  His theories prompted a number of expeditions in search of this mythical land, until James Cook's second journey (1772–1775) led to the conclusion that, if it did exist, it was further south than the 65° line of latitude South.

Atlantis: Atlantis (Ancient Greek: Ἀτλαντὶς νῆσος , "island of Atlas") is a fictional island mentioned within an allegory on the hubris of nations in Plato's works "Timaeus" and "Critias", where it represents the antagonist naval power that besieges "Ancient Athens", the pseudo-historic embodiment of Plato's ideal state (see "The Republic").  In the story, Athens repels the Atlantean attack unlike any other nation of the (western) known world, supposedly giving testament to the superiority of Plato's concept of a state.  At the end of the story, Atlantis eventually falls out of favor with the deities and submerges into the Atlantic Ocean.

Journey to Atlantis: Journey to Atlantis is the name shared by three water roller coasters located at SeaWorld theme parks.  These attractions, while different from one another, tell a similar story of a trip to the mythical land of Atlantis.  Each one combines roller coaster elements, such as chain lift hills and steep drops, with boat-based attraction elements, such as splash-down landings.  All three attractions were designed by MACK Rides of Germany.

Age of Conan: Rise of the Godslayer: Age of Conan: Rise of the Godslayer is the first expansion set for the MMORPG "".  It was announced on August 18, 2009 on by Funcom.  The expansion is set in the mythical land of Khitai and features a new eastern theme.  It was released on May 11, 2010.

Supporting paragraphs: Atlantica Online Atlantis
Answer: Plato