A pilot finds themselves stranded across five distinct historical eras, each filled with hostile aircraft and extraterrestrial threats that must be overcome to escape. In each time period—from early aviation through the early 2000s—the player must eliminate waves of enemy fighters while rescuing fellow aviators descending by parachute, building toward a climactic confrontation with that era's powerful mothership. Destroying the massive vessel requires precision and persistence, eliminating all remaining threats and triggering passage to the next period. Once all five eras have been conquered, the cycle repeats with increased difficulty and speed, testing whether the pilot can survive the gauntlet once more. The visual landscape shifts dramatically across the centuries, from cloudy skies above biplanes and helicopters to the star-filled void where UFOs reign supreme.