TerraOnion MODE - Dreamcast, Saturn & PlayStation ODE

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TerraOnion MODE - Dreamcast, Saturn & PlayStation ODE

Due to supply chain issues and current demand this product is currently not eligible for the flash cart bulk discount.

By selecting a storage option you will receive a compatible storage device. Due to availability of supply we can only guarantee the storage device will be new and a brand name. We cannot guarantee any specific brand. By selecting NONE you will need to provide your own storage device.

This bracket allows for an easier & cleaner MODE install.
* SATURN USE: If you will be using this in a Saturn it is important you select the correct Type. Unfortunately there is no guaranteed way by looking at the outside of the system to know which Type to choose. This will require you to open your Saturn to determine which Type you need by unscrewing the Saturn and opening it up. CLICK HERE for a guide on how to determine which Type to choose

PREORDER - Ships in: 1 to 2 Weeks**
**Preorder shipping estimates are not a guarantee. Preorders may be cancelled anytime before product ships for a full refund.


Intermediate Modification

WARNING: We consider this an Intermediate Level modification for the Saturn/Dreamcast. Meaning only those with some experience modding, disassembling systems, etc. should attempt this modification. Stone Age Gamer, nor the manufacturer, will warranty modifications that are not done properly. If you do not feel comfortable installing the MODE in the Saturn/Dreamcast yourself we highly suggest either using an approved modder (we offer this service for $44.99 which includes the 3D Printed Bracket, see Here for an installation guide using the bracket) or purchase a pre-installed system HERE or bundle the MODE and install service together HERE.



Mod Level: Expert

WARNING: We consider this an Expert Level modification for the PlayStation. Meaning only those with some significant modding experience should attempt this modification. Stone Age Gamer, nor the manufacturer, will warranty modifications that are not done properly. If you do not feel comfortable installing the MODE in the PlayStation yourself we highly suggest either using an approved modder (we offer this service for $99.99) or purchase a pre-installed system HERE or bundle the MODE and install service together HERE.


Compatible with Saturn and Dreamcast, same firmware for both systems. Compatible with both 20 pin and 21 pin Saturn consoles. Compatible with both 5v (VA0) and 3,3v (VA1) Dreamcast (proper voltage level conversion).

Introducing MODE (Multi Optical Disc Emulator) for SEGA Saturn & Dreamcast!

Auto region patching (loads games from different regions without patching games)

• Auto detects the console it's plugged into. No jumpers to configure.

• SATA 2.5 HDD compatible with exfat (works with both hard drives and SSD drives)

• MicroSD

• USB for USB thumbdrives and powered USB hard drives


100% compatible with all Saturn and Dreamcast games!

• Compatible with Redump and Tosec images (for both Dreamcast/Saturn)

• Compatible with CDI, GDI, CCD, MDF, bin/iso+cue images

• Plug and play, no soldering required!

• 2 User interfaces: Simple list view and Advanced Cover Art

• Supports multiple Disc games

• Zero seek times providing faster load times

• Supports Mpeg card, ActionReplay/PseudoSaturnKai, Saturn RAM cart compatible

• DC Digital, DreamPSU and PicoPSU compatible


Tech Data:

• 32-bit MCU at 168MHz with 192KB RAM

• High performance FPGA for accurate data transfer speeds

• USB 2.0 High Speed PHY for high transfer speed from SATA & USB

• Full speed Memory card interface supporting up to 12MB/s

• SATA to USB 2.0 bridge for high speed SATA hard disk access

• Level translators to properly convert signal levels, and support Dreamcast VA0

• Saturn 20pin and 21pin interface with mainboard autodetection

• User IO connector for expansion, and support custom interface boards

• Reset generation and Region selection for Saturn



  • 40 Winks
    40 Winks
  • Chaos Control
    Chaos Control
  • Glover
  • Invasion from Beyond
    Invasion from Beyond
  • Motor Mash
    Motor Mash
  • Shadow Madness
    Shadow Madness

  • Officially Licensed From:Piko Interactive


A) PIRACY – Stone Age Gamer Retroworks, Inc. ("Stone Age Gamer") does not support or condone piracy. Flash carts and similar devices Stone Age Gamer sells and supports are intended to be used only for the following purposes: development, playing games licensed by Stone Age Gamer for use with the product, and/or playing currently owned personally backed-up games and media where it is legal to do so. Stone Age Gamer does not offer support for any other use of this product.

B) PERSONAL BACK-UPS – In many territories it is legal to make back-ups for personal use and/or archival purposes, however it may not be legal in all territories. Please learn the national and local laws regarding this subject before making back-ups for personal use. Please note, in most territories "Personal Back-up" means exactly that; back-ups you made yourself of games you currently own. This often does not include back-ups obtained via other methods (i.e. downloading), even if it is a game you physically own.

C) DAMAGE – Neither Stone Age Gamer or the manufacturer is responsible for any damage of property this product may cause. This is a new product intended to be used on electronic hardware that exceeds two decades in age and Stone Age Gamer can’t guarantee the condition of such hardware. USE AT YOUR OWN RISK.

D) MODIFICATION & USE – Any unauthorized modification and/or non-intended use of this or any other flash cart product sold by Stone Age Gamer shall void both manufacturer and retailer warranties of that product.

E) CLONE / MODIFIED CONSOLES – Flash carts were developed and intended to be used on un-modified original hardware using original hardware accessories. Stone Age Gamer does not guarantee flash cart operation on clone consoles or modified consoles. Flash carts may operate on some clone consoles or modified consoles. However, due to power consumption changes, random hardware changes and/or firmware updates of those consoles we cannot offer a guarantee of flash cart compatibility. Any returns due to incompatibility with clone consoles or modified consoles will result in no refund of any shipping costs and a 10% restocking fee if no defect is found during testing.


50 Reviews

  • 5
    I Already left a review. But I bought multiple, so here it is again.

    Posted by Andrew on Aug 12th 2021

    It's so good I bought it twice, and will leave the same high review. If you are on the fence about it, get it.

  • 5
    End-all ODE for the compatible systems

    Posted by Andrew on Aug 12th 2021

    Why would you put ANYTHING else in your systems? I have one of these in my Saturn and my Dreamcast. After seeing how my Saturn functioned, I immediately bought another MODE for the Dreamcast, even though it already had a GDEMU. Not a penny wasted. If I bothered with a PS1 (i just use a PS2) I'd get another one. I Couldn't recommend this high enough. A must get for anyone who plays these systems.

  • 5
    Easy to setup, works great

    Posted by Todd Blank on Jul 15th 2021

    I had no trouble getting the MODE installed in my V1 Dreamcast, hooked up a 512 GB WD hard drive and everything was working in 30 minutes.

  • 5
    Terraonion Dreamcast

    Posted by Peter Di Martino on Jul 14th 2021

    This mod is the best thing you can do to your Dreamcast. The loading times on the MODE is amazing not matter what media you use. The GDEMU runs very slow on SD cards higher than 64g and the Interface looks horribly boring. I use this with the DC Digital HDMI mod and it works great with it also. I recommend getting the mounting bracket to make life easier. This is the worth the money. Really happy with it.

  • 5
    Worth every penny… installing them in all compatible systems

    Posted by Austin Sergent on Jul 9th 2021

    I originally bought a MODE for my Dreamcast after the laser and disc drive failed. I have used the GDemu in the past and the MODE blows that absolutely away. The interface is beautiful and the SSD compatibility holds all my games, imports, and home brews!

    I bought two more MODEs and plan on installing them in my PlayStation and Saturn ASAP!

  • 5

    Posted by Andy C on Jul 8th 2021

    Just grabbed a 2nd Mode for the DC, my first was installed in a Saturn. It's great, works with 100% of the games never had an issue. Be sure to update the firmware, it adds a gang of new features. I use mine with a HDD+SD card combo. Tried it with a SSD didn't notice much difference, seems wasteful so sticking with a normal HDD. Great device

  • 5

    Posted by Joseph Odom on Jul 2nd 2021

    Very easy plug and play solution for the Sega Saturn, to enjoy some of the greatest games the Saturn has to offer.
    StoneAgeGamer has very fast shipping and are amazing to deal with when it comes to product like this. 10 out 10

  • 5
    Terra Onion MODE

    Posted by Matthew C Manduchi on Jul 2nd 2021

    First off the MODE: Id like to say this is the best ODE ive ever used but its the only ODE I ever used. That being said, the install into my Dreamcast was super easy and I have little moding experience. The instructions, downloadable from terra onion, walk you though installation step by step with large pictures. This is the best way to play Dreamcast games on original hardware. IMO.

    Stone age gamer is a delight to order from. The price is comparable to buying from terra onion directly but without the international shipping cost and transport times (if in the US) It arrived within a couple of days and they were nice enough to hold the item for me and combine with another item I order afterwards. Top of the class.

  • 5
    Best ode for the Saturn!

    Posted by Will on Jun 27th 2021

    Works flawless! Now I don't have to use my expensive disc and risk getting them scratched. At first I figured this was out my budget but them offering klarna as a payment option now I'm able to buy what I need and pay overtime.