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The ultimate accessory for Genesis/Mega Drive. Complete FPGA recreation of the entire Mega-CD/Sega CD hardware into a plug and play Cartridge

World’s First Mega-CD/Sega CD FPGA Optical Disc Emulator 

  • Plays both ISOS (bin+cue) and ROMS
  • RAM based cartridge for instant boot
  • Compatible with all original and region free patched Mega-CD / Sega CD bios
  • Supports Megadrive / Genesis, Sega CD / Mega-CD, Master System and 32X games (requires 32X add-on)

  • B.O.B.
  • The Humans
    The Humans
  • The Immortal
    The Immortal
  • Risky Woods
    Risky Woods
  • Tinhead
  • Zero Tolerance
    Zero Tolerance

  • Officially Licensed From:Piko Interactive

Fully Supports original Megadrive and Genesis hardware (Nomad included but requires simple mod to get audio cd on sega cd games) 

  • Fully compatible with Analogue Mega Sg!
  • Easy to use interface for navigating your collection with screenshots, genre, year and description
  • Save State support for Megadrive and Genesis Cartridge games (8 slots)
  • Built in cheat engine for Megadrive and Genesis cartridge games
  • Emulates all different Genesis / Mega Drive / Master System / 32x cartridge mappers.
  • Stores all different Genesis / Mega Drive / Master System / 32x cartridge saves into microsd card.
  • Per game Mega-CD / Sega CD Backup RAM and Cartridge RAM stored into microsd card
  • Master System FM Core
  • In-Game menu for fast reboot and swapping games (Genesis / Megadrive and Mega-CD / Sega CD)

Enhanced Mega Drive games with CD audio and Mega-CD / Sega CD hardware (MSU1 like) 

  • 400GB Exfat microsd supported

Download the instruction manual in PDF (English)

X3 vs. X5 vs. X7 vs. MegaSD:


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.

30 Reviews

  • 1
    Mega SD

    Posted by Kevin on Jun 26th 2023

    Sadly the Mega SD doesn`t currently work with Analogue`s Mega SG. I contacted Terra Onion and never heard back from them. It did work with a Model 1 Sega Genesis. Looking online it sounds like this is due to a different chip they`re using in their newer carts. Stone Age Gamer was great through the whole process and worked with me on a solution. Thank you Stone Age Gamer!

  • 2
    MegaSD review

    Posted by Soybeans45 on Jun 13th 2023

    It didn`t work on my PAL Mega Drive 2. Every PAL Mega Drive game I`ve tried so far freezes sooner or later (new firmware or old firmware - just doesn`t work at all). Worked on my US Genesis 2 with US/JP NTSC games without problems though. Tried to get in touch with Terraonion on Discord. They pretty much ignored me or simply don`t have the manpower to respond in a timely manner. Sorely disappointed to be honest from the point of view of European gamer. They ought to have mentioned these problems somewhere in the product description. Apparently these problems only affect MegaSDs with the new Intel chips that they were forced to use due to the previous ones no longer being available. So if you`re a gamer with a PAL system you should be aware of this before you purchase this product.

  • 4

    Posted by MegaSD on May 25th 2023

    This is a nice cartridge that allows all of my games to be played with one cart. There were some issues with the cartridge but eventually they were worked out.

  • 5
    Mega SD

    Posted by Manuel on May 19th 2023

    This product is awesome! I have other silmilar devices for other systems and I’m currently using this for my Sega CD titles. It works great and i can use cheats on Sega CD! Terraonion is great !

  • 5
    Mega sd

    Posted by Davide giuffrida on Apr 28th 2023

    The megadrive cart Queen It works like megacd and have many functions im very Happy i bought It!
    Stoneage gamer support Is awesome thanks!

  • 5

    Posted by Damiao Deivid Gomes da Silva on Apr 19th 2023

    Although we have lots of everdrive options at market today, the MegaSD from TerraOnion is a treasure itself. I don`t care if KRIKzz has a supposedly better megadrive everdrive. Mega SD is a perfect everdrive with game thumbs, lots of configurations and it Sega CD game capabilities enabled me to unplug the CD part from my Sega CDx.

  • 5

    Posted by derty on Apr 3rd 2023

    What an amazing product! Works exactly the way you want it to. Love the UI art with the little CRT haha very nice touch. I have the cart running through my analogue Mega SG and the quality of visuals is just amazing. I highly recommend anybody getting this cart for sure!

  • 1
    Did not work on my Model 2 only Model 1 Genesis

    Posted by Ronnie Moreno on Apr 1st 2023

    Contacted stonagegamers first regarding my issue. I was simply given a response wait for firmware update. So they expect me to just not use a product I paid full price for?! Really?! WITH NO OPTION FOR A REFUND! Which no one has a update on when or if this will fix my issue. My model 1 Sega genesis works fine with the Mega SD. My model 2 does not work at all. Which is odd since the Mega everdrive X7 works no matter which revision I use. I own two revisions of the model 1 and one model 2. I would think this wouldn`t matter. Get the mega ever drive and save yourself the frustration of the Mega SD nightmare you could face. Since it`s dependent on you console model and revision.

  • 5
    Great piece of kit

    Posted by Ahmad on Feb 13th 2022

    This is a great device, with a dream list of capabilities and compatibilities. The only limitations I've done across so far relate to the way the original consoles were designed, and not a fault in the MegaSD.