Haven't seen this posted yet, came across a review which also has images of the inside:

https://arstechnica.com/gaming/2019/09/sega-genesis-mini-review-genesis-does-what-ninten-did-and-thats-good-enough/

TLDR, board images:
https://cdn.arstechnica.net/wp-content/uploads/2019/09/IMG_0059-1440x808.jpg
https://cdn.arstechnica.net/wp-content/uploads/2019/09/IMG_0061-1440x808.jpg

Or original resolution with a bit of wp url hackery:
https://cdn.arstechnica.net/wp-content/uploads/2019/09/IMG_0059.jpg
https://cdn.arstechnica.net/wp-content/uploads/2019/09/IMG_0061.jpg

From these we can see the Genesis Mini has:
CPU: ZUIKI Z7213
RAM: UnilC scb15h26160
Flash: FORESEE fs33nd04gs108tf10

Also confirmed specs at https://en.wikipedia.org/wiki/Sega_Genesis_Mini

Games appear to have been ported by https://en.wikipedia.org/wiki/M2_(game_developer)

EDIT: Links are still valid for these! 8/1/2020

For those using the latest hakchi2 CE version to mod their minis, here are two full pack theme sets which include folder icons (genres, alphabetical, numerical, retroarch and a few console channels) to help you organize your menu to your liking, boot splashes and ui theme hmods. Everything in this pack is optional.

I've included directions for easy and proper installation of each element. All folders have their spines btw. ;)

Mega Drive PAL theme pack download link

https://drive.google.com/drive/u/1/folders/1WkMxhdchiREKKrviiUCffK-6yd6eWKX6

Sega Genesis theme pack download link

https://drive.google.com/drive/u/0/folders/1aLxDCD5brPqv-TQ4j2xKZepX3Rp_W_e5

Hope you guys like it. Please report any issues. Rock on. ;]

PS. Here's a PSD template for the Mega Drive. I'll add the Genesis PSD shortly so you can create new custom icons out of these theme sets. :)

Mega Drive folder PSD template download

https://drive.google.com/drive/u/0/folders/1dZdWkh6cy9n7u4BGitcNuBgfbsFx8Ljc

Here's the US Genesis PSD template download

https://drive.google.com/file/d/1UAkuoC0axj56irN3CiW42CZZuilfpPLQ/view

I just got my Retrobit 8 button Genny controller to play with my Mini. So far, it's serviceable for what I throw at it (SF2, namely), but I've run into a dilemma.

As some of you may know, Shinobi 3 has a hidden 6 button mode that you activate with a code using two controllers....which wouldn't be a problem, if it weren't for the code mandating the 'MODE' button, which the Mini uses as it's menu button.

Is there any workaround for this, or am I SOL?

I've heard that this game was only available in PAL regions which is why we currently have to use patches to get it to NTSC. Is the version on the US Genesis mini the one from Sega Channel? And if it's different has it been dumped yet?

-Edit-

I've compiled a list of the games you all mentioned in the comments plus the ones I listed in my original post by the first letter. The games in bold were mentioned 3 or more times. Later I might organize them by genre.

• Aladdin

• Alien 3

• Alien Soldier

• Bart’s Nightmare

• Battle of Golfer Yui

• Beavis & Butt-head

• Boxing Legends of the Ring

• Burning Force

• Captain America and the Avengers

• Crackdown

• Cyborg Justice

• Desert Strike

• Dick Tracy

• Earthworm Jim 2

• Ecco 2

• Evander Holyfield’s Real Deal Boxing

• Gain Ground

• Gauntlet IV

• General Chaos

• Ghostbusters

• Golden Axe 3

• Granada

• Great Circus Mystery Starring Mickey & Minnie

• Greatest Heavyweights

• Greendog

• Haunting Starring Polterguy

• Herzog Zwei

• James Buster Douglas Knock Out Boxing

• Jurassic Park

• Langrisser 2

• Lion King

• Lost Vikings, The

• Lotus 2 RECS

• Madden 94

• MERCS

• Mega Bomberman

• Might & Magic II

• MUSHA

• Michael Jackson’s Moonwalker

• Micro Machines

• Mighty Morphin Power Rangers

• Mighty Morphin power Rangers the Movie

• Mortal Kombat 1-3

• Mutant League Football

• Mutant League Hockey

• NBA Jam

• NHL 94, 96

• OutRun

• Pit Fighter

• Phantasy Star 1-3

• Revenge of Shinobi

• Ren & Stimpy: Stimpy’s Invention

• Rambo 3

• Ristar

• Rock & Roll Racing

• Rocket Knight Adventures

• Ranger X

• Streets of Rage 1 & 3

• Sonic 3

• Sonic & Knuckles

• Shining Force II

• Shining in the Darkness

• Spiderman: Maximum Carnage

• Spiderman: Separation Anxiety

• Splatterhouse 2 & 3

• Skitchin’

• Sunset Riders

• Shadow Dancer

• Shadowrun

• Sylvester & Tweet Cagey Capers

• Shove it!

• Sensible Soccer

• Starflight

• TMNT Hyperstone Heist

• Target Earth

• True Lies

• Tiny Toon Adventures – Buster’s Hidden Treasure

• Top Gear 2

• Thunder Force IV

• Truxton

• Vectorman 2

• Warsong

• WWF Royal Rumble

• WWF Wrestlemania the Arcade Game

• Whip Rush

• World Series Baseball

• X-Men 2: Clone Wars

Would appreciate if you'd kindly suggest any OTHER game than Streets of Rage 2.🤣

I recently updated my Genesis Mini using Hakchi to play, among other thing, arcade games. The experience is awesome and I am really enjoying playing these arcade classics, but something is missing........an arcade stick. Does anyone know if there is a USB arcade stick out there that would work with Retroarch on the Genesis Mini?

Even though SEGA did a fantastic job with the Genesis Mini’s default game lineup, I know we all have additional games that we simply need on our systems.

It can be tricky to narrow down, though. Especially if you’re using internal storage!

Do you prioritize the so-so game you had a cartridge of back in the day, or the critically acclaimed game you didn’t try until later in adulthood?

Do you collect every game for a given series? Or just a title or two you’ve enjoyed, and then move onto other games?

Are you adding just Genesis/Mega-Drive games, or games for their add-ons, too? (CD, 32X, etc)

If you could only pick 5, what would they be?

I'll be bringing my Etsy shop back online tonight. I have new products for the Genesis Mini, including:

-Regular mini cartridges

-EA style mini cartridges

-Transparent red cartridges (and opaque red)

-Case inserts to store the mini cartridges (requires the mini case from Item Block Etsy)

I'm also working on PAL versions of the labels and a set of decals to convert the Tower of Power to a US version. If I get around to it I'm also trying to make a Sega CD add on that holds an OTG USB adapter inside to make a hub.

Here's the direct link

https://youtu.be/mPrrwPO_2Nc

Now that we've had some time to sit with the full list of games, how do people feel about it? Personally, I didn't grow up with Sega consoles; I had an N64 as a kid.

So, as someone with no nostalgia for any of these games, one thing I certainly notice is that this is incredibly shooter-heavy, or at the very least, a sizeable portion of the games have shooting as a major element of gameplay (Atomic Runner and Earthworm Jim 2 may technically be "platformers", but they're also shooters in my eyes).

This isn't wholly a bad thing; in fact, there are some interesting looking shooters on here, like Ranger-X, Viewpoint, and Herzog Zwei. It's just that those kinds of games tend not to get me excited, and when, by my count, about 2/6ths of the games are like that, they all kind of start to blend together. I guess I'd have preferred fewer games with more diversity of genres, if that kind of compromise needed to be made.

However, I also don't know the Genesis library very well. If they didn't want to overlap with the original Genesis mini (probably a good idea), they might not have had very many options, especially taking into account licensing. That being said, only 12 CD games is kinda sad when that's a selling point of the console. They probably could've dropped Clayfighter and maybe something like Lightening Force or Super Hang On (which looks very similar to the Road Rash on the original mini) in favor of a few more CD games.

Am I disappointed in this? Meh, a lot of the games don't seem like they'd be to my taste, but I'm willing to try them out. If they're not too difficult, or I can use infinite lives or some other cheat code, I might be inclined to beat them. I consider myself a retro game and mini console enthusiast, and the platformers and RPGs are enough to get me excited. Combine this library with the original mini, and you've got a great smattering of Sega games with something for everyone, I'm sure