The game is in open beta. In Warframe, players control members of the Tenno, a race of ancient warriors who have awoken from centuries of suspended animation far into Earth's future to find themselves at war in the planetary system with different factions. The game includes elements of shooting and melee games, parkour, and role-playing to allow players to advance their Tenno with improved gear. At the time, the company had been successful in supporting other developers and publishers, and wanted to develop their own game in-house. By 2012, in the wake of the success of free-to-play games, the developers took their earlier Dark Sector ideas and art assets and incorporated them into a new project, their self-published Warframe. Initially, the growth of Warframe was slow, hindered by moderate critical reviews and low player counts. The game is one of Digital Extremes' most successful titles, seeing nearly 50 million players in 2019. Set in the future, players control members of the Tenno, a race of ancient warriors who have awoken from a century-long cryosleep as they awake again on Earth, with their memories about the Old War lost for the moment. In the Solar System, they find themselves at war with the Grineer, a matriarchal race of militarized and deteriorated human clones built upon metal, blood, and war; the Corpus, a mega-corporation with advanced robotics and laser technology built upon profit; the Infested, disfigured victims of the Technocyte virus; and the Sentients, a race of self-replicating machines made by a long-dead transhuman race known as the Orokin. To fight back, the Tenno use bio-mechanical suits, the eponymous Warframes, to channel their unique abilities. All of the factions encountered in the game, including the Tenno, were created by or are splinter groups of the old Orokin Empire, which the Tenno learns was an ancient fallen civilization and former reigning power in the Solar System. Although most of them are long dead by the time of the Tenno's awakening, their lingering presence can be still be felt throughout the Solar System. Before their fall, the Orokin had attempted to conquer the galaxy and sent out colony ships through the Void, a trans-dimensional space that enabled fast travel between stellar systems. None of these residential ships returned, and those they had loaded with Sentients returns with the Sentients now decided to wipe out the Orokin, leading to the Old War, the creation of the Tenno, and finally, the collapse of the Empire. In the game's "The Second Dream" quest which was introduced in December 2015, the player discovers that the Lotus is a Sentient, rebelling against the others to protect the Tenno knowing of their importance.