A compilation of the Talos Principle and its expansion:
In The Talos Principle the player character, an unnamed android, awakes in a serene environment. A disembodied voice calling itself Elohim instructs the android to explore the worlds he has created for it, and to solve the various puzzles to collect sigils, but warns it not to climb a tower at the centre of these worlds. As the android progresses, it becomes evident that these worlds exist only in virtual reality, and that it, like other androids it encounters, are separate artificial intelligence (AI) entities within a computer program. Some AIs it encounters act as Messengers, unquestioningly serving Elohim and guiding the android through the puzzles. Messages left by other AIs present varying views of the artificial worlds and of Elohim, with some stating that Elohim's words should be doubted, while the Milton Library Interface, a text conversation program found on various computer terminals, encourages the android to defy Elohim's commands.
In Road to Gehenna the player takes the role of one of Elohim's Messengers, Uriel. Uriel is instructed by Elohim to free a number of other AIs, all of whom had been imprisoned in a portion of the computer's database called Gehenna. With the simulation having served its purpose, the computer servers are shutting down, and Elohim wants Uriel to help these other AIs prepare for "ascension": uploading their knowledge and memories into the main plot's protagonist. As Uriel explores this realm, the robot finds that many of the other AIs have created their own ideas about what humanity might have been from the records, and have various attitudes from doubt to acceptance for Uriel's intentions and the pending ascension. Uriel can observe the communication of the AIs through their makeshift message board, where they discuss the nature of Gehenna, as well as their understanding of humanity, which some of them try to express through prose and interactive fiction.
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