Star Fox features 14 planets, but unlocking every planet and route offers a significantly more complex experience than initially apparent. Each campaign consists of seven missions, beginning with Corneria and concluding with a variation of Venom. The intermediate five missions' destinations are determined by player performance.

Unlocking Planets and Alternate Paths

Star Fox does not explicitly present the requirements for unlocking all planets and alternate paths during a player's first playthrough. However, after completing the game, the mission select screen allows players to press X to view achievements for each planet, which details that stage's challenges and alternative routes. Below are the unlock requirements for each planet:

  • Corneria: Unlocked by default.
  • Meteo: Complete Corneria without Falco.
  • Sector Y: Save Falco on Corneria, fly through the seven stone arches over the sea, and defeat the Attack Carrier boss.
  • Aquas: Earn 100 hits or more in Sector Y.
  • Katina: Complete Sector Y without earning 100 hits, OR fly through seven warp gates in Meteo. This planet can also be chosen even if Aquas or Fichina are unlocked.
  • Zoness: Complete Aquas.
  • Fichina: Complete Meteo without flying through seven warp gates.
  • Sector X: Complete the fight on Fichina after the timer runs out, OR destroy Saucerer on Katina after it destroys the base.
  • Solar: Complete the fight on Fichina before the timer runs out, OR destroy Saucerer on Katina before it destroys the base.
  • Sector Z: Complete Zoness without being detected by Andross' radar, OR take the warp gate out of Sector X.
  • Macbeth: Complete Solar, OR complete Sector X without Spyborg knocking Slippy out, OR complete Zoness after being discovered by Andross' radar.
  • Titania: Complete Sector X by defeating Spyborg after it knocks Slippy out.
  • Area 6: Complete Macbeth after activating the railroad switches, OR destroy the copperhead missiles in Sector Z.
  • Bolse: Complete Macbeth without activating the switches, OR let the Great Fox be damaged in Sector Z.
  • Venom: Complete Bolse.
  • Venom 2: Complete Area 6.

Navigating 25 Distinct Routes

In total, Star Fox offers 25 possible routes, each presenting varying levels of difficulty. The game often provides warnings for more challenging missions, such as Solar or Area 6, during a player's initial campaign. However, when an alternate route is available for a planet, its unlock requirements are typically more demanding than the standard path, and the subsequent planet usually presents an increased challenge as well.

Players can pursue any route at any time, provided they meet the specific unlock requirements for each planet. There are no inherent progress blocks that prevent players from attempting specific paths once they are accessible.