Scrap Brain Zone

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Sonic Retro emblem.svg Sonic the Hedgehog (16-bit)
Scrap Brain Zone
  • Act 1
  • Act 2
  • Act 3
Sonic1 ScrapBrainAct1.png
Sonic1 ScrapBrainAct3.png
Scrap Brain Zone
Sixth Zone, Sonic the Hedgehog (16-bit)
Number of Acts: 3
Location: South Island
Level themes: industrial, underwater, ancient ruins, underground/cave
Maximum rings, Act 1: 197 + 110
Maximum rings, Act 2: 153 + 100
Maximum rings, Act 3: 108 + 60
Underwater areas: Act 3
Non-English names:
Star Light Zone | Final Zone
For the 8-bit Scrap Brain Zone, see Scrap Brain Zone (8-bit). For the Sonic Drift racetrack, see Scrap Brain (Sonic Drift).

Scrap Brain Zone is the sixth Zone in the 16-bit version of Sonic the Hedgehog. Sonic finally arrives at Dr. Eggman's industrial headquarters, where many deadly traps await.


Scrap Brain Zone is a trap-filled industrial level with much dangerous machinery such as trap floors, flame vents, electrical conductors, and disappearing and rotating platforms. The first Act has Sonic traverse across the outer walls of the fortress, where the player can see grimy, depressing towers expel smoke into the sky, and obstacles such as crushing blocks are abound. Wheels that Sonic can ride in can be reversed by pressing a nearby button, allowing the player to take an alternate route.

Act 2 takes the player inside the fortress itself, where spinning flywheels and conveyor belts will carry Sonic along, and buzzsaws and swinging spike balls will make things all the more dangerous for the hedgehog. This Act also features transport tubes that will send Sonic to different areas when entered into, though one of them holds a secret: the exit of the third transport tube encountered if the player takes the lower path at the start of the Act will suddenly activate if the player re-enters it with at least 50 Rings, leading to a secret shortcut to the end of the Act.

At the end of Act 2, Eggman appears behind a force field and pushes a button which drops Sonic into Act 3. This Act is essentially a fourth Act of Labyrinth Zone with a different palette, and has no encounter with Eggman. Instead, it leads directly to the Final Zone. All of the Badniks that apppeared in Labyrinth Zone, as well as many of its obstacles, are featured in this Act.

All throughout this Zone, it is not possible to enter the Special Stage as the Giant Rings that lead to it never appear. This is because part of the VRAM area normally used by the Giant Ring is used by the animated smoke in the background. A Giant Ring can be added by hand, but it will use garbled tiles whenever the smoke animates.

Originally, Scrap Brain Zone was named "Clock Work Zone", displayed as "Clock  ork Zone" on the title card due to the lack of a letter W in the used font.


We have passed through the polluted city and finally arrived at Dr Eggman’s secret base.
Gears, saws and automatic hammers are on the attack.
There are also submerged caverns beneath the base.

Sonic the Hedgehog JP manualMedia:Sonic1 MD JP manual.pdf[1] (translation by Vertekins)[6]

Slippery metal floors, razor-sharp saws and grinding wheels — now you're one step away from Dr. Robotnik's hideout!

Sonic the Hedgehog US manualMedia:Sonic1 MD US manual.pdf[7]

Instead of going straight to the boss in the end, you get dropped down a level, and we wanted that feeling of fighting your way back up. It would have been nice to draw a specific background just for the final stage, but due to space and time constraints we just changed the background color and made the basement level the same as Labyrinth Zone.

Yuji NakaSonic Jam Official Guide[8]


Caterkiller — Returning from Marble Zone, its body is protected by spikes. Jump on its head to avoid taking damage.
Bomb — Mindless kamikaze bomb bots that walk back and forth along a short plane, either on the ground or ceiling.
Ball Hog — Pig bots that hop in place atop steep banks and roll balls down the slope.
Burrobot — Found in Act 3, mole bots that leap from the ground and then simply move back and forth in a small area.
Jaws — Found in Act 3, piranha bots that troll around underwater.
Orbinaut (Unidus) — Found in Act 3, circled by spiked balls it throws at the player. Also present in Act 1 and 2's Edit mode list.


S2 cucky.gif
Cucky — Acts 1 and 2.
S2 pocky.gif
Pocky — Acts 1 and 2.
S2 pecky.gif
Pecky — Act 3.
S2 rocky.gif
Rocky — Act 3.


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Sonic1 title.png

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