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


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



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.

8 Reviews Hide Reviews Show Reviews

  • 5
    TerraOnion MODE - Dreamcast, Saturn, & Playstation

    Posted by Anthony King on Feb 10th 2021

    What can I say, this nifty little device works as intended. I purchased this for my model 2 Sega Saturn so I could finally play some of the awesome RPG's that have been on hold forever. Games like Shining Force 3, including sceario 2 and 3 play like a charm with this baby. I still have other games like Dragon Force, and Shining the Holy Ark to play through, but so far, no issues have occured. The only hiccup was getting the Shining Force 3 ISO files to play. This was more a format issue in editing the text file to allow playing. Otherwise, I'm very happy with the TerraOnion MODE. Thank you very much :D

  • 4
    more robust than other options

    Posted by Philip Baitman on Jan 27th 2021

    Using this in a Dreamcast. Love the menu over other options. That said, I do think this is quite expensive for the functionality.

  • 5
    Excellent purchase!

    Posted by Jorge Hawkins on Dec 11th 2020

    Excellent build quality and incredibly easy to install. Constant software updates are very appreciated! Greetings from Mexico!

  • 3
    Does Exactly what you want for a price that isn't worth it

    Posted by JJIMOB on Dec 11th 2020

    MODE is easy to install and easy to set up. The provided instructions are easy to follow . The compatibility I've had so far is great. However, other solutions that do the same thing with the same level of quality come at a far more affordable price point. MODE would be the best ODE solution for Dreamcast/Saturn if it wasn't grossly over priced.

  • 5
    TerraOnion MODE

    Posted by Givenbak on Dec 10th 2020

    For the Dreamcast, this is a beginner level hardware install. I have a VA0 model and just had to put two plastic feet on the MODE and then plug it into the GDROM slot. That was it. It works brillantly. The menus are responsive and quick with no interlacing. I love the ease of just throwing my games on a Micro SD and playing. In addition, I only had to solder one wire to get it to work with my DCDigital HDMI board. Now I don't have to get up to reset the console or load a multi-disk. I can do that with some button presses on the controller. This is my top recommendation for Dreamcast fans.

  • 4
    Cautious "modder" successfully installs MODE

    Posted by nearvanaman on Nov 29th 2020

    I'm not a Luddite but I get a little anxious when opening up and disassembling technology. Thankfully the instructions are solid (the official YouTube video from TerraOnion was great). The install (Saturn) went without much of a hitch but just a few things to look out for: 1) If you're using a hard drive or SSD, make sure you prep it (format it per instructions, add your folder and any games) before you screw it all in. 2) The plastic stand-off legs that the board sits on need to be 'pinched' in order to remove the board. So, before you stick to the shielding, make sure the pinchable parts of the legs are easily accessible. I had mine facing inwards and it made it difficult to pinch. I had to unstick the legs, reposition and re-stick them. And that was it. I do agree that the menu looks weird (other review here says it's because it is displaying at 480i) and I thought there was something wrong with my cables initially. I'm actually running it through a RetroTINK 2X-Pro. But once the game starts it looks pretty good. Big investment but the lack of soldering really is a boon for those of us who are not proficient.

  • 2
    Saturn 480i menu is vomit inducing

    Posted by Daria on Nov 29th 2020

    The MODE does what it says it does but the choice of making the saturn's game select menu only in 480i is vomit inducing and drags the whole experience down.

  • 5
    Saturn - Easy Install Works Great

    Posted by Ben on Nov 25th 2020

    Relatively easy install, instructions included all the information you need. Paired it with a 500GB SSD and its working great.