Star Fox (SNES, 1993)
The game that proved a home console could render real-time 3D. A rail shooter built simultaneously with the hardware that made it possible — and 30 years on, still one of the most technically audacious projects in SNES history.
The Super FX Chip: Hardware in the Cartridge
Star Fox exists because Nintendo was willing to put a separate processor in a game cartridge. The SNES CPU — a 3.58 MHz Ricoh 5A22 based on the WDC 65C816 — was not capable of the floating-point mathematics required for real-time 3D polygon rendering. Argonaut Software’s hardware team, led by Ben Cheese and Robert Aitken, designed the GSU-1 (Graphics Support Unit 1) specifically to address this limitation.
The Super FX chip ran at 10.5 MHz and functioned as a dedicated RISC coprocessor embedded directly in the cartridge. It received polygon coordinates from the game engine, performed the matrix transformations required to project them onto the screen, and wrote the results into a frame buffer that the SNES then read as video output. The SNES CPU was effectively demoted to an input-handler and audio scheduler while the Super FX chip ran the entire game.
Chip Name
Super FX (MARIO Chip 1 / GSU-1)
Clock Speed
10.5 MHz
Architecture
RISC coprocessor - cartridge-embedded
Polygons per Frame
~80–100 (scene-dependent)
Frame Rate
10–20 fps (variable)
Audio
8-channel SNES SPC700 (Hirasawa)
Three Routes Through the Lylat System
Star Fox structures its campaign as three branching routes — each starting from Corneria and ending at Venom, home of the tyrant Andross. The routes were selected at the start of the game and could not be changed mid-playthrough: Route 1 provided seven missions at accessible difficulty; Route 3 presented the densest enemy formations and demanded mastery of every system the game used.
Route 1 — Easy
Route 3 — Hard
Mission Highlights
Corneria opens every route with an atmospheric dogfight that introduces all core Arwing mechanics. The first boss — Granga, a giant bipedal walker — establishes the pattern: destroy the boss to advance, but protect your wingmen to maintain their survival for subsequent missions.
Meteo (the asteroid belt) is the game’s first environment that demands constant evasion alongside combat. Asteroids cannot be shot and will destroy the Arwing on contact — the player must navigate the rotating field using boost, brake, and barrel rolls while maintaining offensive fire against enemies emerging from the debris.
Macbeth is the franchise’s most memorable surface mission: a rail run over an industrial munitions planet beside a moving train. Players who hit eight trackside switches can divert the train into a buffer before it reaches the weapons depot — ending the level with a massive explosion and a score bonus. Missing the switches ends in a conventional boss fight against Mechbeth.
Area 6 (Route 3 only) is the game’s definitive space combat gauntlet — Andross’s primary fleet staging area, with the densest enemy formations in the game. Surviving Area 6 leads directly to the Route 3 Venom approach and Andross’s true form.
Andross: Emperor of the Lylat System
Andross is a former Cornerian scientist exiled to Venom for conducting biological experiments that threatened Corneria City. From Venom, he built a military empire and launched the invasion that the Star Fox team is commissioned to stop. His character design — a giant disembodied ape head and hands — was unprecedented in the 3D gaming landscape of 1993.
The game presents two versions of Andross depending on the route taken to reach Venom. Routes 1 and 2 confront Fox with a mechanical construct — an enormous face that attacks with suction and explosive cube projectiles. Route 3 reveals Andross’s biological true self: a disembodied brain with mechanical eyes, representing his survival beyond exile through the corruption of his own body. Completing Route 3 is the game’s true ending.
“Shigeru Miyamoto designed the Star Fox characters by drawing anthropomorphic animals inspired by the fox statues at Fushimi Inari-taisha shrine near his childhood home in Sonobe, Kyoto Prefecture.”
— Nintendo producer notes on Star Fox character design
Gameplay and Documentation
Star Fox SNES — full longplay (all three routes)
Super FX chip: how the cartridge coprocessor worked
Star Fox 2: What Was Cancelled
Star Fox 2 used the upgraded GSU-2 chip (21 MHz) to build significantly beyond the 1993 original. Where the first game presented a linear rail shooter with branching routes, Star Fox 2 added a real-time strategic layer: a mission map showing the Lylat System, with enemy ships advancing toward Corneria while the player was engaged elsewhere. The player chose which missions to take based on the current threat level.
The game also introduced Landmaster tank and Blue Marine submarine transformations that could be used mid-mission, two new playable pilots (Miyu and Fay), and a two-player simultaneous mode. All of this was complete and functional when Nintendo cancelled the release in 1996. The leap from the 1993 original to this cancelled sequel — built on the same hardware family — was more substantial than any individual feature suggests.
“Star Fox 2 was 99% complete when cancelled — all missions were built, all bosses were programmed, and the game was ready to ship. Nintendo pulled it from the schedule after seeing PlayStation and Saturn 3D games.”
— Development history documentation