TerraOnion MODE + Installation Bundle + Bracket

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TerraOnion MODE + Installation Bundle + Bracket

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.

By selecting YES we will mod your Dreamcast with a new rechargeable and easily replaceable system battery.

By selecting YES we will upgrade your Saturn with FRAM. This means your save data will remain even if battery power is lost. Battery is still required for keeping system date.



PLEASE NOTE: Only PU18 Motherboards are compatible with the MODE and the Playstation kit.  Please check your model number to make sure you have a 500X or 550X model, we can only accept that model.



PLEASE NOTE: Modding/Installation Services typically take 1 - 3 weeks from the time we receive the console. The return shipping cost of this service is NOT eligible for flat rate shipping.

MOD CHIPS: Mod chips should have no affect on this modification. However, Stone Age Gamer offers no responsibility for a preexisting modifications. While rare, there could be a scenario where Stone Age Gamer has to replace your motherboard. We would not replace or reimburse the customer for any preexisting modification. If for some reason your modification is found to be incompatible with the MODE product Stone Age Gamer is not responsible for replacing or reimbursing the customer.

Now includes 3D Printed Bracket (Color will be Black for Saturn or White for Dreamcast - if you'd like to request another color please see our separate link for the MODE Bracket and mention in the customer notes during checkout if you prefer a different color you see available there)


You may send console in at anytime after purchasing or if you want to wait we automatically e-mail you once stock is about to arrive.

Ship just your Dreamcast/Saturn/Playstation with invoice to:
(please no AV cables, power cables, or accessories)

Stone Age Gamer - MODE
378 E. State St.
Salem, OH 44460

SATURN ADDITIONAL POWER: We will install all additional power cables for all Saturn models that may require it.

PLEASE READ: We highly suggest insuring your shipment to us. We are not responsible for any damage until the console is received and inspected. Your console must be in working order when inspected. We are not a repair service, we only provide the installation of the MODE product. Do NOT ship your console to us without purchasing this service first.

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.


12 Reviews

  • 5
    Terra Onion MODE

    Posted by Paul Nortness on Feb 21st 2024

    Installed MODEs in my Saturn and Dreamcast, super fast and easy. Was up in running in less than 30 minutes! Definitely worth every penny! Thanks SAG!!!!

  • 5
    Gaming preservation must have

    Posted by Daniel F. on Aug 17th 2023

    Amazing mod quality and work. Works perfectly with no hassles and brings life back into dead or dying Dreamcast consoles. The mod also help preserve game disks and gaming history. A definite recommendation!

  • 5
    Dreamcast builder

    Posted by Totally amazing even in 2023 on Mar 28th 2023

    This is the best way to get your Dreamcast up and working if the GD rom disk is experiencing issues with reading the game disc. It makes me think twice about spending all that money on EBay on used Dreamcast games. The emulation is near prefect can’t believe this product exist using the same hardware to emulate the game is the best way to go. I played a bunch of games and it was totally similar experience to playing with the actual disk. I bought a Saturn with the mode. Don’t forget to get SSD adapter it will make loading in new games with ease. Thank you Stone Age Gamer for custom building me the ultimate Dreamcast.

  • 5
    Satisfied Customer

    Posted by Christopher J Hyman on Nov 14th 2022

    This review is for the Dreamcast Builder service since I couldn't write a review for the builder section I'll leave it here. I sent in my DC. I went with new shell, label, and light, new capacitors, battery and controller fuse mod, new fan, and the MODE. Everything was done professionally no marks no rattling or missing screws. Well worth the price for their services. Highly recommend.

  • 5
    Outstanding service.

    Posted by Nick F. on Feb 17th 2022

    Getting this ODE installed is a fantastic service if you're not too comfortable with disassembling your console, or if you just want some extra bells-and-whistles. I had mentioned that a few screws were missing on my Saturn, and they had replacements ready to go. The cleaning service made the console look brand-new, and the FRAM installation is helpful as well. A great service and a fantastic product.

  • 5
    PS1 mode installation bundle

    Posted by Mike C. on Nov 13th 2021

    This process was very easy and professionally handled by Stone Age Gamer. They actively communicated with me when to send my PS1 to them for service, and the turnaround time was quick, within 2 days. Well worth it for the exceptional service they provide. If you are not comfortable removing CPU pins, these guys can.
    5 Stars all around.

  • 5
    Outstanding Service

    Posted by Pejman Roozbeh on Oct 18th 2021

    I sent in my Sega Saturn to get TerraOnion Mode professionally installed with my Mode purchase and I am very happy with both the product and how quickly it was worked on and shipped back to me. Not only that, but the crew here at StoneAge Gamer has been exceedingly helpful and communicative throughout the process. They were very patient and informative in answering my questions and additional requests as I prepared sending in my console. They even helped me customize another pre-modded console purchase while helping me with this separate service. I always felt very well taken care of throughout the entire process and will more than gladly return to StoneAge Gamer for more of my retrogaming needs! 7 out of 5 stars :D

  • 5
    Great Service and an amazing mod

    Posted by Adam Pierce on Jul 25th 2021

    So for the last few years I have avoided playing my Saturn out of a fear of damaging the disc's I have accumulated over the years. Luckily for me, the guys here at stoneagegamer not only had terraonions in stocks, but also offer a service to install it and give your saturn/dreamcast a nice cleaning and make it look brand new again. Shipping was quick, and the customer service was outstanding. Would recommend stoneagegamer to anyone looking into a service like this

  • 5
    The Upgrade I Needed

    Posted by James on Jul 9th 2021

    I had the GDEMU in my Dreamcast before picking up the MODE for about a year. I never got more than about half my games to work. With the MODE, which has actual instructions and support, I got all my games working within a day - the exact same ROMS mind you. That alone was worth the price to me. Fine installation from the Stone Age team as well. I have a heavily modded system already and it was no problem for them to work on this without disturbing any of the other work, which I really appreciated.