Atari XL/XE - Rescue on Fractalus [Lucasfilm Games] 1985

Released in 1985, this main game is a first-person shooter/simulator where you pilot a "Valkyrie" fighter on a rescue mission across a fractal-generated alien planet. Your core loop involves using a direction finder to locate downed pilots amidst craggy mountains and dense atmosphere, while avoiding anti-aircraft guns and enemy kamikaze saucers. Fuel management is critical, as rescues are the only way to replenish supplies. Its distinctive feature is the procedurally generated, hazardous terrain, which demands precise altimeter use, especially during difficult night missions.