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Earth has been long abandoned due to its toxic atmosphere. It is now overgrown with mutated jungle structures that have devoured most of the prior signs of civilization. Infestation and roaming wildlife still inhabit its surface but anything of value was stripped by scavengers generations ago.
Like most living organisms, the Grineer require water to survive. Beneath Earth's towering forest canopy are rich reserves of fresh water that the Grineer have fought hard to maintain for many years. Evidence of their long-standing occupation is found among their many outposts that have been taken hold by giant roots, moss, and other layers of vegetation over time.
—Earth Settlements Fragment
Earth (also referred to as Ancient Er by the Ostrons) is a planet that has since been mostly abandoned, its surface mostly overtaken by a large, mutated jungle structure. The Grineer have taken control over this planet, intending to poison the forest and build their empire over it. It is the first planet players can access, and is linked to Mars and VenusJunctions. And once the player has completed The Second Dream quest, Earth will then be connected to Lua as well.
Earth is the only planet to feature the Grineer ForestTileset. Every four hours, the forest tileset will change from day to night, mimicking the day cycles in real life. The change will feature different vegetation that can be scanned for extracts that are used to craft Antitoxins, Apothics and medical regeneration packs, with Sunlight variants during the day and Moonlight variants at night.
The Assassination Target for Earth is Councilor Vay Hek, located in the mission node Oro. Unlike the nodes of bosses on other planets, his node is not able to be accessed until the player is of Mastery Rank 5, which requires progressing way further into the solar system but doesn't require defeating him either. Vay Hek drops the component blueprints and parts of the HydroidWarframe.
Earth is the first planet to feature a Landscape, introduced in Update 22: the Plains of Eidolon. Rather than featuring a jungle like most of Earth, the Plains consists of a wide, open terrain containing the remains of an ancient battlefield and the ruins of an enormous Sentient. Nearby is the settlement of Cetus, which is home to the Ostrons, a colony of peaceful merchants.
The personification of the Earth in Greek Mythology (Gaia).
Despite being previously described as a "desolate, ruined world" Earth has very lush forests, which Vay Hek tried to destroy during The Cicero Crisis. This original description is probably no longer canon.
The lore behind the founding of Cetus, which describes the founders of Cetus having found a place free of poisons on an otherwise toxic planet, suggests that it is probably still canon, but that most of Earth, even if forest, remains toxic to normal humans.
From the navigation map, Earth appears to be mostly rendered into desert, with southern Africa appearing either flooded or forested and most of central Europe covered in a dark shadow which could be scorched earth or dense, dark vegetation. It is possible that the forests, however small, are simply the only places with small enough concentrations of Grineer and valuable enough resources to be worth occupying.
Return to Warframe’s first planet with a completely new look. Earth Remastered offers improved volumetric lighting, a conversion to PBR materials, and a new vegetation system, which create a mood and atmosphere far more advanced than the original January 2014 update did.
The new lush forests of Earth are yours to explore. This Update turns the formerly good-looking planet into a stunningly lush, beautifully lit, alive, organically structured environment.