Dr. Chaos
Famicom Disk System · 1987
About this game
The player assumes the role of Michael Chaos, brother of mad physicist Dr.
Ginn Chaos, who has been doing Warp Zone experiments in his mansion and gone missing.
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Armed with only a Knife in the beginning, as Michael moves through the house, he can pick up Handgun Bullets, Machine Gun Bullets, Grenades and life-replenishing Yellow Vitamins and Red Vitamins.
There is a menu which has four options, open, get, go, and hit.
There are 11 Warp Zones in all.
At the end of each of the first 10 Warp Zones, Michael must fight a large monster that carries a piece of the Laser and guards a valuable piece of equipment, the latter consisting of the Ultra Space Sensor, four Life Bottles, the Air Helmet, the Jump Boots, two Blue Vitamins and the Shield Suit.
Once Michael fully assembles the Laser, he'll be able to challenge the final boss, Canbarian.
About Famicom Disk System
Japan-only, the Famicom Disk System (1986) was Nintendo's floppy-disk-based add-on for the Famicom, hosting several games (including the original Legend of Zelda and Metroid) before they were later ported to cartridge internationally. Because it never released outside Japan and its proprietary floppy disks degrade over time, complete, working Famicom Disk System software is a specialized import-collecting niche.
Gamevaro tracks Dr. Chaos for Famicom Disk System with separate market values for loose, complete-in-box (CIB) and factory-sealed copies, sourced from real eBay sales. Prices also vary by region — PAL, NTSC-U and NTSC-J releases of the same game often sell for different amounts due to print run sizes and regional collector demand.
Adding Dr. Chaos to a Gamevaro collection takes seconds — search by title or scan the box barcode, and the app fills in cover art, release details and current pricing automatically. This FDS release dates back to 1987.
Price history
Market values by condition
Recent sales
| Date | Type | Region | Price |
|---|---|---|---|
| 2026-07-16 | Boxed (CIB) | NTSC-J | €58.43 |
| 2026-07-16 | Sealed / New | NTSC-J | €116.61 |
| 2026-07-16 | Loose / Item only | NTSC-J | €19.72 |
| 2026-07-14 | Boxed (CIB) | NTSC-J | €58.34 |
| 2026-07-14 | Sealed / New | NTSC-J | €116.42 |
| 2026-07-14 | Loose / Item only | NTSC-J | €19.69 |
| 2026-07-13 | Sealed / New | NTSC-J | €116.36 |
| 2026-07-13 | Loose / Item only | NTSC-J | €19.68 |
| 2026-07-13 | Boxed (CIB) | NTSC-J | €58.31 |
| 2026-07-12 | Loose / Item only | NTSC-J | €19.68 |
| 2026-07-12 | Boxed (CIB) | NTSC-J | €58.31 |
| 2026-07-12 | Sealed / New | NTSC-J | €116.36 |
| 2026-07-10 | Boxed (CIB) | NTSC-J | €47.75 |
| 2026-07-10 | Loose / Item only | NTSC-J | €19.51 |
| 2026-07-10 | Sealed / New | NTSC-J | €95.32 |
| 2026-07-09 | Sealed / New | NTSC-J | €95.58 |
| 2026-07-09 | Boxed (CIB) | NTSC-J | €47.88 |
| 2026-07-09 | Loose / Item only | NTSC-J | €19.56 |
| 2026-07-08 | Boxed (CIB) | NTSC-J | €47.76 |
| 2026-07-08 | Sealed / New | NTSC-J | €95.34 |
| 2026-07-08 | Loose / Item only | NTSC-J | €19.51 |
| 2026-07-06 | Sealed / New | NTSC-J | €95.21 |
| 2026-07-06 | Loose / Item only | NTSC-J | €19.49 |
| 2026-07-06 | Boxed (CIB) | NTSC-J | €47.69 |
| 2026-07-04 | Loose / Item only | NTSC-J | €19.49 |
| 2026-07-04 | Boxed (CIB) | NTSC-J | €47.69 |
| 2026-07-04 | Sealed / New | NTSC-J | €95.21 |
| 2026-06-30 | Boxed (CIB) | NTSC-J | €61.37 |
| 2026-06-30 | Sealed / New | NTSC-J | €122.74 |
| 2026-06-30 | Loose / Item only | NTSC-J | €18.96 |
Market insights
Rarity & condition
Dr. Chaos has a steady sales history on the tracked marketplaces, meaning enough copies circulate to establish a reliable market price.
Complete-in-box (CIB) copies typically command a premium over loose cartridges/discs because the original box and manual are more fragile and get discarded or damaged over time — fewer complete sets survive.
Frequently asked questions
How much is Dr. Chaos worth?
Dr. Chaos for Famicom Disk System is currently worth €19.72 loose, €58.43 complete in box, and €116.61 factory sealed. Prices are based on real sales and update regularly on Gamevaro.
Is Dr. Chaos rare?
Dr. Chaos has a steady sales history on the tracked marketplaces, meaning it trades hands regularly and isn't considered particularly rare.
What's the difference between loose, CIB and sealed for Dr. Chaos?
Loose means cartridge or disc only, CIB (complete in box) includes the original box and manual, and sealed means factory-sealed and never opened. For Dr. Chaos, loose is €19.72 and CIB is €58.43 — CIB commands a premium because original boxes and manuals are fragile and often don't survive.
Ratings & Reviews
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