Almost all the worlds you see in Kingdom Hearts are from classic Disney films, such as Aladdin and the Little Mermaid. These worlds you can only get to by means of the Gummi Ship. In almost each world there is an extra playable character you can choose to put in your party (but for only that particular world). At the end of each world there is a boss of course (except the 100 Acre Wood). So here we have information of all the worlds shown in KH.

Playable Characters: Sora
Non-Playable Characters: Kairi, Riku, Tidus, Wakka and Selphie
Disney Film: None
Boss: Darkside (Sora's dream)
Save Points: 1, in the small hut near the waterfall.
You start off in this world which is definately classified as "safe", well, untill a stormy night... Here you learn the friendships of Sora, Kairi and Riku before they're separated from each other. Here you can have a few little fights with Selphie, Tidus, Wakka and Riku (it's good for leveling up).

Playable Characters: Donald, Goofy, Sora
Non-Playable Characters: Leon, Yuffie, Aerith, Cid, Merlin, Fairy Godmother
Disney Film: None
Boss: Guard Armor, Opposite Armor, Leon
Save Points: 1, Accessory Shop next to the fireplace. 2, in Merlin's house.
Summon: Earthshine (Simba): Obtain from Leon in the Secret Waterway.
This is the world where you get all your supplies for your travels to other worlds. This is also the only world that has a shop and a synthesis shop. You also first meet Donald and Goofy here. Basically, if it wasn't for this world, you'd be dead meat. And you meet some of your favourite Final Fantasy characters here too.

Playable Characters: Donald, Goofy, Sora
Non-Playable Characters: Alice, Queen of Hearts, Rabbit, Cheshire Cat, Cards
Disney Film: Alice in Wonderland
Boss: Cards and Tower, Trickmaster
Save Points: 1, the Rabbit Hole room in which you start. 2, on the left of the Court where the Queen of Hearts is.
This world's quite small compared to some others, but it's a good starting point. The Heartless here are quite easy, until you come accross the Large Body's. Alice gets into some trouble where she is accused of stealing the Queen of Hearts heart. And Sora's job is to collect all the evidence pointing towards Alice's innocence. Good luck!

Playable Characters: Donald, Goofy, Sora, Tarzan
Non-Playable Characters: Jane, Clayton
Disney Film: Tarzan
Boss: Sabor, Clayton, Stealth Sneak
Save Points: 1, Jane's Tent. 2, on a ledge above the tree/tunnel. 3, Treetops.
This world isn't too bad, the only thing that makes this world annoying is the encounters with Sabor all the time. Your first task here is to collect all the camera slides for Jane, they are all located around the camp and are quite easy to locate. The thing that makes this level fun is the swinging from vine to vine in the Treetops.

Playable Characters: Donald, Goofy, Sora
Non-Playable Characters: Hercules, Phil, Hades
Disney Film: Hercules
Boss: Cloud, Leon, Yuffie, Cerberus, Behemoth, Hercules, Hades, Rock Titan, Ice Titan, Sephiroth
Save Points: 1, Coliseum Lobby.
The best place for levelling up and winning some handy items. The cups are: Phil Cup, Pegasus Cup and Hades Cup. The Guide to the Coliseum cups are located at the bottom of the "Bosses" page.

Playable Characters: Donald, Goofy, Sora, Aladdin
Non-Playable Characters: Jasmine, Jafar, Genie, Carpet, Abu
Disney Film: Aladdin
Boss: Pot Centipede, Tiger Head, Jafar, Jafar (Genie form), Kurt Zisa (Optional)
Save Points: 1, in Aladdin's house. 2, in the Store Room. 3, the Desert. 4, the Cave of Wonders in the underground water tunnels. 5, Treasure Room before battling Jafar.
Summon: Genie
This world can be quite a maze, especially inside the Tiger Head. Jasmine gets captured by Jafar and taken away in a pot, at least, that's what you're lead to think and you have to try and save her by defeating Jafar later on in the world.

Playable Characters: Donald, Goofy, Sora, Riku
Non-Playable Characters: Gepetto, Pinocchio, Jiminy Cricket
Disney Film: Pinoccio
Boss: Parasite Cage
Save Points: 1, Gepetto's boat. 2, outside the entrance to the mouth.
Summon: Watergleam (Dumbo)
Definately a maze if there for the first time without any help. There are loads of items to get in Monstro, so best have a good scout around. There are 6 Chambers in Monstro, and you need to get to the right one that leads to the Mouth. Pinocchio gets taken away by Riku in this world and Riku attemps to steal Pinocchio's heart, but failed because of Pinocchio's conscience. Stealing Pinocchio's heart is a piece of the plot that can't be missed.

Playable Characters: Donald, Goofy, Sora, Ariel
Non-Playable Characters: Flounder, Sebastian, Ursula, Jetsam, Flotsam, King Triton
Disney Film: The Little Mermaid
Boss: Shark, Ursula and Jetsam and Flotsam, Ursula
Save Points: 1, inside a shell where you first start. 2, inside a shell behind Triton's Throne. 3, inside a shell down the right tunnel inside Ursula's hideout before battling her for the first time.
Not as easy to get lost here, for there are arrows pointing in the right direction to Triton's Throne. The cool thing about this level is the swimming underwater and your Party (Sora and Co.) change into sea animals. Sora becomes a Merman, Goofy becomes a Turtle and Donald becomes an Octopus. The swimming takes a while to get used to, but Flounder, Ariel and Sebastion help you out with that.

Playable Characters: Donald, Goofy, Sora, Jack Skellington
Non-Playable Characters: Doctor Finkelstein, Sally, Oogie Boogie, Shock, Lock, Barrel, The Mayor
Film: Tim Burton's a Night Before Christmas
Boss: Shock, Lock and Barrel, Oogie Boogie, Oogie Boogie (Mansion)
Save Points: 1, in the Guillotine Square where you first start. 2, the top of Oogie Boogie's Mansion.
A pretty cool world. ^^;; Sora and Co. dress up for Halloween and they look awesome. ^^;; This world has some nasty Heartless lurking in the shadows and because of how dark the world is, you can barely see what you're doing! So you better keep your eyes peeled for those hidden items!

Playable Characters: Donald, Goofy, Sora, Peter Pan
Non-Playable Characters: Captain Hook, Wendy, Tinkerbell
Disney Film: Peter Pan
Boss: Shadow Sora, Captain Hook, Phantom (Optional)
Save Points: 1, Ship: Hold - to the right as you enter. 2, Ship: Cabin - to the left as you enter. 3, Clock Tower: On the Clock Tower.
Summon: Tinkerbell
This world's awesome because you get to fly at high speed! ^^;; The heartless here are medium level really, except for the random encounters with Shadow Sora. Wendy has been captured and Peter's there to save her but ends up bumping into Sora and joins his party. You only get to visit the Ship and the Clock Tower, which is a pity.

Playable Characters: Donald, Goofy, Sora, Beast
Non-Playable Characters: Malificent, Riku, Ansem, Bell, Snow White, Cinderella, Alice, Jasmine, Sleeping Beauty, Kairi
Disney Film: None
Boss: Riku, Malificent, Malificent (Dragon form), Riku (Ansem), Behemoth
Save Points: 1, Rising Falls - at the bottom. 2, Library - up the stairs next to a table. 3, Castle Chapel - infront of the doorway heading to the Lift Stop.
Summon: Fireglow (Defeat Malificent Dragon form to obtain Mushu)
This world is very confusing first try and you can get lost easilly. The Heartless here are almost as tough as they can get, but there's more! You have to fight Riku twice! Beast is pretty handy for this world and it's best to use him as much as possible. You're aim is to free the 7 Princesses from Malificent and to that you must go head-to-head. A lot of items to collect here, so keep a look out.

Playable Characters: Donald, Goofy, Sora
Non-Playable Characters: Ansem, King Mickey, Kairi, Riku
Disney Film: None
Boss: Chernabog, Ansem (4 forms all together), Darkside, Artillery, Head, Main Core
Save Points: 1, Gateway to the Dark - Entrance. 2, Walk along the path collecting the treasure until you reach a cave, that's where the 2nd Save Point is located. 3: After the Behemoth Boss battle, drop down to the bottom and climb up the vine to your left, there should be a platform with a Save Point. 4: Portals, 100 Acre Wood - Once you go through the last portal you'll be taken to the 100 Acre Wood, there should be a Save Point there. 5, after defeating the 2nd Behemoth after fighting the Winged Demon, you'll go through a heart shaped portal and you should find the last Save Point.

So haaard. This world is so annoying you can tell why it's called the End of the World, because you feel like it's the end of your game because you can't complete it. Lol. The Heartless here are the hardest they can get. You better make sure you're a very high level for this world and have top-notch equipment and abillities and have loads of items stocked up!

Playable Characters: Sora
Non-Playable Characters: Winnie the Pooh, Tigger, Piglet, Rabbit, Owl, Roo, Eeyore
Disney Film: Winnie the Pooh
Boss: None
Save Points: 1, Map

The place where you can chill out with some cool mini-games! Yay! Absolutely no Heartless here. To get to this world you need to get the repaired "Old Book" from Cid and take it back to Merlin, then you can visit this awesome world! To unlock each mini-game you need to collect all the torn pages for the book that are scattered all over the worlds.