Adventure Time Theme Song

The Adventure Time Theme Song and opening title sequence features all of the main characters and also some of the minor characters. It has the same lyrics as the Animated Short but there are some slight variations. The opening title sequence starts with a view of a post-apocalyptic wasteland that features a rat inside of a broken television, several undetonated nuclear bombs embedded into the ground, and a wounded arm reaching up from the stump of a dead tree, confirmed to be a zombie arm. Then it shows a rookery of penguins (two of them are hugging each other with a tiny red heart floating above their heads) that make a few quick quaking sounds. Next is a Snow Golem sitting on a grassy hill and then the rest of the Ice Kingdom appears including the Ice King flying in the air next to an ice covered mountain, he spins around to face us while activating his Ice Powers from his hands. Then the Candy Kingdom and a large crowd of Candy People laughing and dancing in the middle of the road. After the camera rises above Princess Bubblegum's Castle, Princess Bubblegum smiles and wave as she flies past us while riding on the back of Lady Rainicorn. Then Marceline the vampire is seen playing her Axe-Bass while sitting outside of her cave, she turns and hisses while showing us her pointy teeth. The ending shows Finn and Jake's Tree Fort and then the two of them inside. Beemo was seen sitting on a shelf. When they pound their fists together, a loud smashing sound is heard and the theme song begins. When the show's logo is seen, Finn (without his green backpack) and Jake float up using feathered wings sticking out from their backs while holding a white piece of cloth that says with Finn and Jake. The is sung and played by series creator Pendleton Ward. It ends when Finn and Jake reach the top of a rocky mountain that they were climbing. Finn gets to the top and strikes a victorious pose while Jake lies down near Finn as the show begins.

Lyrics
The lyrics with ukulele chords to the theme song are as follows: G Adventure time, D c'mon grab your friends, C we'll go to very  D distant lands. G With Jake the dog and D Finn the hu-man, the C fun will never D end, it's adventure G time!

Characters
thumb|right|300px|The original intro to the short. The following characters can be seen in the opening sequence:
 * Beemo
 * Finn
 * Ice King
 * Jake
 * Marceline
 * Penguins
 * Princess Bubblegum
 * Lady Rainicorn
 * Snow Golem
 * Tree Trunks
 * Two-Headed Goose
 * Rat
 * Various Candy People:
 * Starchy, Mr. Cupcake, Gingerbread Muto, Sugar Cube, Lollipop Girl, the two Gumdrop Lasses, Chocoberry, Mr. Candy Cane, Raisin, and the Guardians of the Royal Promise.

Production notes

 * A character peeping over the balcony of the Candy Castle can be seen briefly. According to Pen Ward, this is a cameo by Gingerbread Muto, the Candy Person version of storyboard artist Adam Muto. Pen says he puts Adam in most of his films because it "riles him up."
 * The final shot with Finn and Jake posed on a mountain was inspired by the fantasy art of Frank Frazetta.
 * The beginning of the sequence, with the rising musical tone and flying over the landscape was inspired by the opening sequences of The Simpsons and Pee-wee's Playhouse.
 * Pen states: "If you listen carefully to the recording, you can actually hear Derek Drymon typing on a keyboard in the bit when Jake is walking... a little clickity clack in that wide shot when his legs are stretched out. I recorded the lyrics for the opening title in the animatics room where we have this little crummy microphone JUST so that we could add it to the titles and submit it to the network. Later, we tried re-recording it and I didn't like it... I only liked the temp one."

Early versions
To the right is a rough version of one of the many early versions of the title sequence that didn't get used. Many recognizable faces appear, including a worm, Ice King, Iceclops, Marceline, Princess Bubblegum, Lady Rainicorn, Phil, Tree Trunks, Gork, Wendy, and even the Snail.

300px|right|An early concept

Alternate versions
"Adventure Time with Fionna and Cake" is the first episode to feature an alternate version of the opening theme, performed by Natasha Allegri instead of Pen. For more information on this version, see Adventure Time with Fionna and Cake.thumb|300px|right|The comparision of fionna and cake intro and finn and jake intro.

Trivia

 * During the post-apocalyptic wasteland scene, for a few seconds you can see a gray arm with purple spots and a chew mark, coming out from the tree with an axe in it and arrows. It has been confirmed to be a zombie arm.
 * There is a two-headed duck in the field in front of Finn and Jake's home.