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.
Due to the visual obstructions caused by the mountain ridges, players must rely heavily on the onboard direction finder to pinpoint the locations of the downed pilots, whose visual beacons are often masked. Flying consumes fuel, making efficient pathfinding and resource conservation paramount to mission success.
Fuel replenishment is intrinsically linked to the primary mission objective: successfully rescuing a pilot. Rescued personnel bring their remaining fuel supplies aboard the fighter, directly tying continued flight capability to mission completion.
The mountainous terrain is actively hostile. Certain peaks house fixed anti-aircraft guns that the player must either destroy or skillfully evade. Furthermore, as the difficulty increases across higher levels, enemy forces known as Jaggis begin deploying aggressive kamikaze saucers, adding an element of active aerial threat to the search pattern.
The defining characteristic is the procedural generation of the terrain via fractal technology, ensuring that the challenging mountain ranges are varied and unpredictable across different play sessions. The necessity of using the altimeter during low-visibility night missions to prevent catastrophic crashes adds a layer of simulation depth to the core shooter mechanics.
As a main game from the mid-1980s, this title was widely distributed across numerous early computing and console systems, including the Atari 7800, Atari 8-bit family, Commodore C64/128/MAX, Atari 5200, ZX Spectrum, TRS-80 Color Computer, Amstrad CPC, and Apple II. Being a classic standalone release, there are no current official downloadable content packs, expansions, remakes, or remasters associated with this title.