100th Episode Special

100th Episode Special is the one-hundredth episode of Numberstairs.

Story
Infinio and Ogguare talk about how far they have reached in Numberstairs. Pie, Josh, and 50 other characters talk about it, also. Infinio and Ogguare also talk about plans for Season 5 and the upcoming spin-off Alphastairs. Ki(kath) also starts planning to go on a quest with Infinio to help her find her identity. Oggy and True write a song about what they have done. Stephen also photographs what they have done in the past 99 episodes. Trinitrotoluene and Chico plan for the Numberstairs Halloween Special. They start by looking at the pumpkins they just started growing 1-14 days ago. Celtic celebrates by singing a song. After the song was over, Ogguare celebrates by splitting into his factors. He splits into two Stripes, four Rebeccas, five PandaBlocks, ten Chamys, twenty Butters, twenty-five Punchcars, fifty Gatys and one hundred Oggys.

Song Lyrics
Celtic: This is me,

Celtic: Ten and three!

Celtic: Turning this into a game! (Celtic almost slips)

Celtic: I'm changing my luck! (Arif was in the way)

Celtic: I won't come unstuck, (he steps in MDZ's mud puddle)

Celtic: As long as I don't say my name! (Chamy is nearby having weird thoughts)

Celtic: Call me one more than twelve, (Arif and Oggy made 12+1, Dorito appears as a black shadow)

Celtic: Or ten and three! (Chamy and Emily appear as a compound, with Eight-Diego standing near)

Celtic: What ever you call me, I'm still me! (Josh silently appears with a "Wow" that can not be heard)

Celtic: I'm the happiest number you've ever seen,

Celtic: So lucky, (bounces)

Celtic: To be unlucky! (Olivia thinks that weird)

Celtic: Number thirteen! (Butter's soccer ball comes near him)

Arif and Oggy: Thirteen!

Celtic: Thirteen!

MDZ and Gaty: Thirteen!

Celtic: Thirteen!

Chamy and Emily: Thirteen!

Celtic: Thirteen!

Everyone: Thirteeeeeeeeeeeeeeeeeeeeeen!

Celtic: Unlucky me!

Celtic (screams): Also thirteen is soccuh numbah! (Punchcar is nearby, thinking it's eleven, not thirteen)