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All areas of the game are technically immediately accessible to the player upon acquiring the ship launch codes, however many areas are protected by logic puzzles which can often only be solved through learning more of the Nomai and speaking to fellow space explorers.
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The central premise of the game is exploration, with the player compelled to uncover the remains of the Nomai civilization to find the cause of the time loop and complete the game. These codes, and the knowledge of them, are the same across subsequent loops, allowing the player to immediately launch the ship without first visiting the observatory. For example, in order to use the ship, the player must get the launch codes from colleagues at the local observatory. In the first part of the game, the player links with an ancient Nomai statue which ensures that the player retains information discovered in each time loop when it restarts. Thus, the player is encouraged to learn why by exploring and uncovering secrets of an extinct race known as the Nomai, who previously colonized the solar system hundreds of thousands of years ago. Outer Wilds features an unnamed player character exploring a solar system that is stuck in a time loop, going back 22 minutes after its star goes supernova.
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