- Main article: Aliens
Rosetta was the name given to a set of alien remains found on Tau Volantis by the Sovereign Colonies research expedition. Dr. Earl Serrano described the creature as almost fish-like in appearance and anatomy.
"Rosetta" was the name assigned to the corpse of a alien entity found encased and perfectly preserved within the ice of Tau Volantis by one of the SCAF digging expeditions. The remains were taken to a facility for study by Dr. Serrano and his colleagues. They eventually realized that the Alien Machine they were also studying could only be interfaced with using the unaltered DNA of the aliens themselves. This made Rosetta, frozen solid and perfectly preserved, vital to the project of creating a Codex.
When General Mahad ordered the destruction of all scientific samples and data in response to the worsening Necromorph outbreak, Dr. Barton aboard the CMS Greely sent out an encrypted message to the scientists on the surface, instructing them simply to "HIDE ROSETTA". By this time, the frozen body of "Rosetta" had been sliced into a number of cross-sectional slabs. Despite the chaotic situation, at least a few scientists who survived the initial stages of the cleanse order managed to partly succeed in the task, taking a number of Rosetta slabs from the biology wing and scattering them in different areas of the research complex.
Dead Space 3 Edit
Isaac Clarke first hears about "Rosetta" via Jennifer Santos, who intercepts an encrypted radio transmission being sent from the CMS Greely to the planet surface. After Isaac explores the Greely and decrypts the message, the two speculate that "Rosetta" may have been a key female scientist in need of protection from the purge.
Later on, Isaac and remaining crew members Ellie Langford and John Carver learn the truth about Rosetta, and are forced to locate the frozen sections of Rosetta's body, scattered throughout the different wings of the research compound. Once all were found and sent back to Ellie and Carver, they used a machine capable of probing the dormant mind of the alien to discover what happened to its race and find out the secret of the Markers.
- Rosetta, as viewed slab-by-slab, has no visible organs whatsoever, only a thick and solid cross-section.
- The main menu is animated in the form of Rosetta's remains; each slab represents a different screen.
- Rosetta is most likely named after the Rosetta Stone. A stone that provided the key to the modern understanding of Egyptian hieroglyphs.
- Rosetta Stone is also sometimes used to represent a key in the process of decryption of encoded information.