I recently resumed playing through Metal Gear Solid HD Collection and had just started Metal Gear Solid 3 when I noticed something was missing. MGS3 is an incredibly deep game, but after you've beaten it there isn't much to do… unless you thoroughly explore each area Snake walks through, at which point you realize the game is teaming with details. Much of it is the animals you can capture or eat along with the special items you may not have found the first time through the game.
Metal Gear Solid 2 allowed you to capture the dog tags off enemy soldiers in order to earn special items, such as the stealth camouflage or infinite ammo, and had a viewer built into the game so you could track your progress. It was a nice way to see how much extra stuff you could find and pick up as you replayed the game.
MGS3 has nothing like that, so its a surprise to discover there is far more secret stuff to find. In MGS3 eating every animal you find, as well as shooting every single hidden frog coin bank in the game, will unlock special items. There's also additional secrets such as weapons or camouflage sprinkled throughout the game.
Now unfortunately, because MGS3 is linear this means you can't simply play to the last boss and then backtrack through the entire game to pick up stuff you missed; you really have to remember it as you play through. Unless you're sitting down with an FAQ or other guide in front of you as you play, this isn't really possible. As much as I love MGS3 it takes about 18 hours to play through, and most people won't feel like replaying the entire game because they missed some item ten hours in.
Years ago as I sought to alleviate this issue and to learn Adobe In Design I created a fairly short PDF which had a check list for all special items and things in the game, as well as a listing of every location in the order you visit it in the game with a summary of the unique stuff to do in that area. This included unique animals to kill and eat and the location of the frog. To get that information I copied the works of two guides on GameFAQs that told you the locations of all frogs and animals. The frog guide (whose sentences I copied verbatim) was MangaMan505's Find the Stupid Frog Guide and the animal one was Vesperas' Markhor Rank Help FAQ. I contacted the authors to get their permission to release the guide but only one ever responded before the trial to In Design expired (making me unable to ever update the PDF), so I never released it (I also pilfered dozens of official Konami images but that's par for course on the internet).
However the guide is so useful that in retrospect it seems like a mistake to not share it, so I'm doing that now. If either one of the GameFAQ authors contacts me with a complaint I'll take it down, but for now I'm going to offer it up in hopes others might also rekindle their love for MGS3.
Download the normal version of the PDF here, and the even more condensed version which contains some embarrassing spelling errors and other nonsense here.