Beyond Good & Evil HD

There are 14 Mdisks in total, but you need only 11 of them to unlock the achievement. Here's the full list of Mdisks.

1. Game Save Disc - You have this from the start and use it to save your game.
2. Mr. De Castellac - The mission disc you receive at the beginning before going to Black Isle.
3. The Pearl and the Currents - An information disc given to you by IRIS.
4. For Jade - A gift from Pey'j given to you at the Nutripils factory.
5. Surveillance Camera - Footage of Pey'j on the conveyor belt. It is in the cabinet next to his jetboots.
6. Hillyan Army Database - A full list of the gear used by the Hillyan Army and the Alpha Sections. Found in the security room above the area where you find the jetboots.
7. Beluga Check-Up - Found on the desk by the Beluga.
8. Animal Species - A photo album of all the species on Hillys. You receive it as a reward when you complete the photo survey.
9. IRIS 511 - An early, lackluster report from before you arrived. Pick it up in Ming-Tzu's backroom.
10. IRIS 512 - Another early report. Pick it up in Ming-Tzu's backroom.
11. IRIS 513 - Your finished report on the Nutripils factory. Pick it up from Ming-Tzu's backroom.
12. IRIS 514 - Your finished report on the slaughterhouse. Pick it up from Ming-Tzu's backroom.
13. Disc Game - On http://beyond-good-and-evil.ubi.com/beyond-good-and-evil-hd/..., you can enter the "Internet Code" given when you save your game. Not only does it include you in a leaderboard depending on your in-game stats, but it also give you a code to get the disc from the jukebox and play Francis' disc game online. This code is unique to each player.
14. Pearl Game - A little pearl game you get as a reward from Mammago for collecting all the pearls.

List found on: http://www.mahalo.com/beyond-good-and-evil-pearl-list/

UPDATE: The links are dead, long live the links. Thanks to ChewieOnIce for commenting below on the circumstance.

If you were unable to receive the email to complete the mini-game online, this link will transport you to the "Success" page and automatically give you the code to access the "Mdisk" in Akuda's Bar. However, you must already be signed into the Darkroom for the link to work correctly.

Mdisk 13 - Disk Game

Not a complete solution, just a link for Mdisk 13 to get your 4 character code to use on the locker at the Akuda Bar next to that shark's puck game.

http://darkroom.bgemyth.net/

Adding to Ryowebo's solution, if you miss one (I missed the Hillyan Army Database) and need to get Mdisk #13 in order to get the achievement without having to start over, here are some tips for that:

1. After you sign up for an account, you will need to check your email for a verification code. Very often this email ends up in spam folders, so look out for it.
2. Once you have done that and entered in your online code (which may take a few tries as they are difficult to read) you will play a little hangman minigame. You have to beat it without making 4 mistakes, so if you are having problems with that, try this helpful post I found:
http://forums.ubi.com/eve/forums/a/tpc/f/908103432/m/3981056...

Then you will be greeted by a fake error page with an error code. There's your code for the safe in the bar. Hope this helped as it took me quite a while to figure everything out.