Peter Parker (of Earth-295) is a alternate version of Peter Parker who was killed in the "Age of Apocalypse".
When Legion, the mentally unbalanced mutant son of Professor Charles Xavier and Gabrielle Haller, traveled back in time in an attempt to kill Magneto, he accidently killed Xavier instead, creating a alternate universe known as the Age of Apocalypse. In that reality, mutants became the dominant species of the planet, and Apocalypse rose to power and enslaved humanity.
Peter Parker was an acquaintance of Gwen Stacy, an agent of the Human High Council, and was killed in one of Apocalypse's early cullings because he was a potential contact of Gwen. It is currently unknown if he had superpowers, or was Spider-Man.