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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).


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  • 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.


88 Reviews

  • 5
    Terraonion MODE

    Posted by Matthias Grant on Apr 8th 2024

    Couldn’t ask for better functionality than this. Was already on latest firmware and ready to go in my U.S. Sega Saturn. Especially love the features for multi-disc games!

  • 5
    Terraria onion mode and Stone Age

    Posted by Richard on Mar 8th 2024

    One of the best products you can buy it has three different systems and it`s pretty much straightforward a drag and drop situation i have lot of these units and Stone Age Gamer does a very good job of answering all your questions I`ve been shopping with them for almost 10 years so if you haven`t give them a chance you should definitely do so you won`t regret it especially this product

  • 5
    TerraOnion mode

    Posted by Julia on Feb 5th 2024

    Seriously as easy as drag and drop. I`m so used to console modding requiring at least a little troubleshooting. Not today. To get this set up was as easy as unscrewing my Dreamcast, removing the old optical drive. Dragging some files onto a hard drive. Then plug the hard drive into the MODE and the MODE into the Dreamcast and its all goodtogo!

  • 5

    Posted by Eythan on Jan 25th 2024

    While I originally had my reservations about the price point in comparison to a GDEmu, those were squashed once it showed up. It`s safe to say this is a quality product, and is a must-have for all Dreamcast owners.

  • 5
    Great way to load all owned games

    Posted by Todd Rodgers on Dec 12th 2023

    I just got my first Dreamcast as an early Christmas gift from my wife. A co-worker of her`s told me about this site and I saw I had a VA1 model DC so this mod made sense. Very simple install and it worked straight away. Getting the preformatted SSD along with the cover art was a good decision. Highly recommend

  • 5
    Terraonion MODE Dreamcast

    Posted by Matt Van Bodegraven on Dec 5th 2023

    This is just what I needed on my Dreamcast to update it. I also go the bracket and SD loader. This makes keeping my Dreamcast modern without the slow load times. Just need to get one for my PS1

  • 5

    Posted by Melvin on Nov 2nd 2023

    Hands down the best ODE solution for the SEGA Dreamcast. Able to fit the entire library on a SSD is awesome, and pairs very well with the DC2DigitalHW mod.

  • 5
    Possibly the Best Investment for Dreamcast

    Posted by John on Jun 2nd 2023

    I love this device. Nothing beats running the games from an SSD. The menu is very cool with box art and quality of life bonuses. No regrets on this investment.

  • 4
    Basically drag and drop once setup.

    Posted by JJ on May 4th 2023

    The Mode is a solid product for the Saturn and Dreamcast. The ability to use a HDD and drag and drop files with optional subfolders is the big draw. The other ODE solutions are less money, but difficult to obtain and setup. I do take a star off as Terraonion has customer support issues (buy from SAG to avoid some of these) and they don`t really strive to make their existing products the best they can be. No firmware updates like you would see on Krikzz products even when issues are known and documented. Despite this there isn`t anything out that tops an SSD plus a MODE for the Saturn or Dreamcast. Avoid it for the PSX