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TerraOnion MODE - Dreamcast, Saturn & PlayStation ODE

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TerraOnion MODE - Dreamcast, Saturn & PlayStation ODE

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


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).


  • Cool Herders
    Cool Herders
  • Criticom
  • Street Racer
    Street Racer
  • Invasion from Beyond
    Invasion from Beyond
  • Motor Mash
    Motor Mash
  • Shadow Madness
    Shadow Madness
  • One
  • Street Racer
    Street Racer

  • Officially Licensed From:Piko Interactive


  • 100% compatible with all Saturn and Dreamcast games!
  • 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
  • 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



A) PIRACY – Stone Age Gamer Retroworks, Inc. ("Stone Age Gamer") does not support or condone piracy. Flash carts, ODEs (optical drive emulators), 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 / ODEs were developed and intended to be used on un-modified original hardware using original hardware accessories. Stone Age Gamer does not guarantee flash cart / ODE operation on clone consoles or modified consoles. Flash carts / ODEs 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.


82 Reviews

  • 5
    Easy to use

    Posted by Anthony on Dec 26th 2021

    I had heard of the Dreamcast when it came out but I never had one growing up. After hearing about it from other people my desire to get one increased and one day I finally bought one. The Terraonion Mode is the best ODE option for the Dreamcast hands down. Its easy enough to install and to use it is dead simple. I've been very happy with my purchase and I cannot wait to get a Terraonion Mode for my Saturn.

  • 5
    Don't think, just buy!

    Posted by Nico Farhat on Dec 19th 2021

    I got 2 of these, one for the Saturn and one for the Dreamcast. This has given both systems new life. My DC's laser died and it would have costed me an arm and a leg to get a new one, now i can play MVC 2 until the wee hours of the night, just like when i was a kid! Easy to install(Saturn is a little finicky, but easy enough). Do your self a favor, and buy it. Way better than the GDEmu

  • 5
    Incredible device!

    Posted by Cory on Dec 17th 2021

    Just a fantastic board! A perfect solution to the half-dead disc drive in my Dreamcast. Not only is the system much quieter now, but the games load faster, and is has a great UI and a ton of options to customize.

    One small issue, the included sticky pads don't quite fit right in a VA0 Dreamcast because of the heatsink that is in the way. So I would recommend getting a 3d printed bracket.

    Other than that I really have no issues at all. This is my first Terraonion product, but definitely not my last!

  • 5
    Great Product, Fast Service!

    Posted by Kari Wooten on Dec 10th 2021

    I got the MODE to install in a Japanese Sega Saturn, and all I have to say is - wow! SAG shipped it out right away and it arrived in less than a week with no issues. Installation was a breeze despite this being my first Sega Saturn project, and the results are incredible. I will be spending my holiday season playing Christmas NiGHTS and Panzer Dragoon Saga, and partying like it's 1995!

  • 5
    Exactly what it says on the box.

    Posted by Kate D. on Dec 3rd 2021

    I have honestly never had such an easy to use, set up, and understand mod for anything before. Popped this in the Dreamcast with a hard drive I had set up before it even arrived and it just worked. I later bought the PS1 install kit and same thing, it just works. I will be buying a second once I have some funds for it.

  • 5
    Excellent ODE Solution for Sega

    Posted by Todd Dietrich on Dec 2nd 2021

    I have two MODEs: one in a Dreamcast and another in a Saturn. They're easy to install and configure and I've not found any games they don't work with. If you're looking for a ODE option for your Saturn or Dreamcast, I can't recommend these highly enough.

  • 5
    TerraOnion MODE

    Posted by Julien on Nov 22nd 2021

    I bought it for use in a Saturn and I can see myself ordering another one for Dreamcast someday. Very easy to install, works perfectly with all the games I installed on it, user experience is overall very good. Shipped faster than expected considering it comes from Andorra. I hope for a firmware update in the future that would allow transferring files between the storage mediums so I could move games from SD card to SSD and could avoid uninstalling the entire unit to get the SSD out.

  • 5
    Terraonion Mode - Dreamcast & Sega Saturn

    Posted by Joseph Garcia on Nov 21st 2021

    Excellent Product. Works Fantastic. Will definitely buy a second for my saturn.

  • 5
    Terraonion mode

    Posted by Rob H on Nov 21st 2021

    Love it! Works exactly as described. Great to be able to play unattainable games like panzer dragoon saga :)