Complex sentence: Sega's 1970 electro-mechanical combat flight simulator "Jet Rocket" featured shooting and flight movement in a 3D environment from a first-person perspective, a precursor to first-person vehicle combat video games such as "Battlezone" and "Hovertank 3D".
Split into simpler sentences: Sega's 1970 electro-mechanical combat flight simulator "Jet Rocket" featured shooting and flight movement in a 3D environment from a first-person perspective. This was a precursor to first-person vehicle combat video games such as "Battlezone" and "Hovertank 3D".