UPDATE 5/17/13: These games plus a few more were on sale for $8.99 through 5/31/13 in the Sega Awesome Pack [Download]
UPDATE 3/21/13: Pack was on sale for $7.49

Nice Pack for Windows XP/VISTA/7 for retro gamers.

SEGA Genesis Classics Series 1 [Download] $7.50
SEGA Genesis Classics Series 2 [Download] $7.50
SEGA Genesis Classics Series 3 [Download] $7.50
SEGA Genesis Classics Series 4 [Download] $7.50
SEGA Genesis Classics Series 5 [Download] $7.50

THESE ARE ALL STEAM GAMES WITH INDIVIDUAL STEAM KEYS FOR EACH SERIES. (You will get 5 Steam keys)

The nice thing about how this works through Amazon is that you can choose what Series you want to keep and activate it via Steam. If there's some that you already own on Steam(or Amazon) or you don't especially want a Series you can give the key code(s) to a friend. Once you enter it on Steam it is tied to your account though, so if you want to give it as a gift, just copy the key code from the screen and send it in an e-mail to whoever you want to gift it to. You don't have to rush to activate them, the keys are stored in you Account-->Games & Software Library and won't expire. You can choose to activate them on Steam right away or wait and do it later when you're ready to start playing the games.

Note: To download using Steam you have to first create a Steam account(which is free) and then install Steam's Downloader. The games can also be downloaded through Amazon(using their downloader) and then activated on Steam. (Amazon downloads always take longer for me though and can sometimes be troublesome) Once activated, Steam will automatically apply games patches/updates(when and if needed).

Here's a summarized list of all the games you get.

Sega Genesis Classic Pack 1: (Partial Controller Support)
Altered Beast
Comix Zone
Crack Down
Ecco the Dolphin
Gain Ground
Golden Axe
Shadow Dancer
Shinobi III: Return of the Ninja Master
Vectorman

Sega Genesis Classic Pack 2: (Partial Controller Support)
Alex Kidd in the Enchanted Castle
Bonanza Bros.
Columns
Ecco Jr.
Eternal Champions
Fatal Labyrinth
Galaxy Force II
Kid Chameleon
Ristar
Super Thunder Blade

Sega Genesis Classic Pack 3: (Partial Controller Support)
Alien Storm
Bio-Hazard Battle
Columns III
Decap Attack
Ecco: The Tides of Time
ESWAT: City Under Siege
Flicky
Golden Axe II
Sword of Vermilion
Virtua Fighter 2

Sega Genesis Classic Pack 4: (Partial Controller Support)
Alien Soldier
Gunstar Heroes
Landstalker: The Treasures of King Nole
Light Crusader
Shining Force
Shining Force II
Shining in the Darkness,
Streets of Rage
Streets of Rage 2
Wonder Boy III: Monster Lair

Sega Genesis Classic Pack 5: (Partial Controller Support)
Beyond Oasis
Dynamite Headdy
Golden Axe III
Phantasy Star II
Phantasy Star III: Generations of Doom
Phantasy Star IV: The End of the Millennium
Revenge of the Shinobi
Streets of Rage 3
Vectorman 2
Wonder Boy in Monster World

And yes, it's also missing the Sonic games.

UPDATE 5/17/13: 12 Sonic game combo pack was on sale Sonic Action Pack [Download] for $9.99 (STEAM keys):

Sonic & Sega All-Stars Racing
Sonic 3 & Knuckles
Sonic 3D Blast
Sonic Adventure DX
Sonic CD
Sonic Generations Casino Night DLC
Sonic Generations
Sonic Spinball
Sonic The Hedgehog 4 Episode 2
Sonic the Hedgehog 2
Sonic the Hedgehog 4 Episode 1
Sonic the Hedgehog

Comment: This review does not show up as an Amazon verified purchase because I bought the Amazon version last month.

This is a great collection to anyone who feels a litlle nostalgia for old 16 bit games.

You get 50 games in this single pack. While not all of the Sega Genesis important games are here (missing Sonic, Chakan and a few others), the collection is quite impressive.

The game requires a Steam account. If you dont know anything about Steam, visit [] (in a nutshell is one of the best digital game distribution systems and a great gaming community tool)

On this package you receive 5 installation codes that you input into Steam and that activates the games.

You first deal with a launcher where you select the game you want to play. This launcher allows you to save your position in any game at any time, so for some of the RPGs this is great. It also allows you to configure your game pad. I am curretnly using an Xbox 360 game pad and it works great with this launcher. You can also select resolution and aspect ratio you want out of the games.

The games scale nicely in the higher resolution screens of today. I just recently played Shadow Dancer and Streets of Rage 2 in my 1080p monitor and it looked great in fullscreen (I decided to maintain the 4:3 aspect radio of old TVs instead of going with the widescreen option).

While some of the games are not as good as others, just the value of the Shinobi games, the Phantasy Star games and the Streets of Rage games makes this worthwhile.

Yes, dont expect remakes of the games, this are exactly like the ROMS you can get at some sites on the web that are run with emulators. I just think that the launcher, the integration to Steam and the ability to configure a game pad makes this a great prize.

This pack comes on sale for 5 bucks here and there on Amazon. I would probably wait to buy it until it reaches that sale point, but yeah, it is a great pack filled with a ton of fun games from the distant gaming past. I have a lot of fun revisiting titles like these from time to time. The pack is actually five different game packs bundled together, so you will need to download each separately. Anyway, for the frequesnt sale price, this is pretty much a must own for any gamer or anybody who wants to revisit the old days of gaming.
You receive Steam keys btw. Not sure if that matters to you or not, but it is good info to have regardless.

The only reason I got this is because this was on sale for VERY cheap, I love the Genesis back in the day, and I expected Sonic games! The only Sonic game that's in it is 3D Blast, and that's an OK game, I just expected Sonic 1, 2, 3, & Knuckles. There are other good games, like Shinobi, Golden Axe, and Vectorman. Still good to get when it's cheap!

This pack, when on sale, typically goes for around $7.50 - assuming you have a retro vibe going, which is why you're looking at reviews for Genesis games, this is a steal at that price and includes Mega Drive Game Packs 1-5 in Steam-redeemable keys. The only downside? You have to redeem the keys on steam. HOWEVER, you can run the emulator (program that makes the games work on modern computers) outside of steam.

For a retro gamer such as myself, this was easily worth the $7.50 just for pack 5, which includes Phantasy Star 2-4.

Some fun games in here. The interface is dreadful. Instead of appearing individually, the games are accessed through a launcher that makes you forward/back through all the games instead of being able to select from a list. It also provides no info on the game besides the title, so if you don't remember the 90's you can't really just browse through to pick one to play. Without a list view, you probably won't even be able to remember which games you've purchased. The good news is the actual emulator seems decent with support for save states (so you don't need to rely on the game's built in save points), as well as video filtering options to smooth out the somewhat rough 16-bit offerings (these can also be turned off if you're a purist). Didn't notice any performance problems with the games I've played so far. Sadly it does not work properly through Steam in-home streaming (neither controllers nor audio were working for me while streaming), though the whole package is small enough that installing it in multiple places is no big deal.

Do not waste your money on this, it runs worse than any publicly available emulator and crashes constantly. The sound is miserable and hardly works. You'd think it wouldn't be that hard to emulate a 22 year old game but this proves otherwise. The UI is barbaric and doesn't allow you to search for a game or choose from a list, instead you have to cycle through all of the games to find the one you want. I paid 5$ for this and completely regret it.

A great collection of classic and not-so classic games. I have two minor gripes: the launcher and the lack of FULL gamepad support. While the games can be run in fullscreen, the launcher itself is a tiny little window only. Gamepads are supported  except for exiting the game back to the launcher, which is bound to ESC, meaning you'll still need a keyboard or a keymapping hack to use this with gamepad only.