Prince of Persia

EDIT AGAIN: Looks like escencede has put the videos back up. Find them here: http://www.youtube.com/playlist?list=PLED22CF06EE700931&... . They look a little different than before, but that might just be because I haven't seen them in a couple years. It looks like he still shows how to get all the light seeds though.

EDIT: Well, it seems escencede decided to delete all his guides for Prince of Persia from his account. I can't seem to find any other complete video guides out there, so for now, I'll have to just link you to the text guide on Gamefaqs. http://www.gamefaqs.com/xbox360/945943-prince-of-persia/faqs... It still gets the job done, but it'll be a little tougher without being able to see it in a video. I'll keep my old solution down there in the off chance he puts the videos back up.

OLD SOLUTION: I found escencede's video guides to be much better than Mahalo's videos, as Mahalo tends to wander aimlessly half the time.
Here's all of the videos on his page: http://www.youtube.com/profile?user=escencede&view=video...

It seems that those videos aren't working anymore, so I really recommend this guide, created by G40st, showing images with every light seed location and a brief description on how to get them.

http://guides.gamepressure.com/princeofpersia/

Once in the page, you only need to select which area you would like to see at the right side of the page

Not so much a solution, but a little encouragement to those who are stuck with the 999 light seed glitch. I viewed all of the posted solution yet none of them mentioned anything about how to "avoid" or if there is a fix to the glitch.

My finding: the glitch is not avoidable, per se, and if you are lucky, you might not encounter said glitch. However, this does not PREVENT you from completing the light seed achievements! A HUGE tip I could offer to those who are now starting the game is to do your best to keep track of which light seed you are able to get and follow the video guides provided on TA's walkthrough. Keep track of how many seeds you have gathered according to the back button map and if they tally up to the total light seeds correctly. If not, save your game, reload a previous save file and see if the total number is still incorrect or not. This will help you pinpoint the precise moment the glitch occurred and thus, which stage is glitched and to resume searching that area for all of the light seeds available.

For example, take into consideration the stage "City Gate" of the "City of Light" series. This stage is available from the beginning of the game after you finish the first stage. Right away, you are able to get 40/45 light seeds available on that particular stage without using any Ormazd plates. There is 1 Blue Ormazd plate on that stage that will help you get 5 light seeds. Now, after comparing a couple of my save files, I realized my "City Gate" stage was listed 41/45. Glitched stage found! However, I wasn't able to pinpoint which seed caused the glitch if there was even a glitched seed. I proceeded to gather the 5 seeds from the blue plate and lo and behold:



46/45 City Gate...

So be vigilant in your search for the seeds. You may have encountered a similar glitch to mine, which does not prevent you from missing the achievement, but is a pain in the arse to find that missing seed. Save often and keep on searching!

I started out using MahaloVideoGames's guide, but I switched over to NoKtoLive's light seed videos - they have been very helpful for me so far & much more concise.

http://www.youtube.com/playlist?list=PL01052223307D550A