The “Birthday Cake”side quest in Split Fiction presents an intriguing blend of whimsy and surprise, initially creating a delightful atmosphere before transitioning into a challenging confrontation. Unveiled in Chapter 5, players take part in Mio’s fifth birthday celebration within the enchanting confines of a Candyland. The objective appears straightforward: scale a massive cake and light five candles. However, beneath this sugary facade lies a fierce boss battle that transforms a festive occasion into a tumultuous fight for survival.
Locating the Birthday Cake Side Quest

To embark on the Birthday Cake quest, players must venture near the conclusion of Chapter 5, entitled Rise of the Dragon Realm. After successfully solving the Dragon Soul puzzle and breaking four metal eggs, your next task is to veer to the left of the main path.
Approaching the Portal
- Keep an eye out for a floating gummy bear, your guiding beacon.
- Bounce off the gummy bear to propel yourself to a higher elevation.
- This will direct you to the portal leading into the Birthday Cake challenge.
With that, you are all set to engage in this vibrant, candy-themed platforming endeavor.
Ascending the Birthday Cake
Your journey begins with a seemingly cheerful platforming task, but be warned — there are numerous hurdles to navigate as you climb.
1) Navigating Through Candyland
- Traverse the rotating waffles, timing your jumps carefully to prevent falling.
- When faced with a dead end of gummy bears, perform a jump-attack on the green candy ground to break through.
- Hop over rotating chocolate sticks, which shift unexpectedly, demanding quick reflexes.
- Utilize yellow jelly launchers by jump-attacking them to springboard ahead.
2) Challenges Along the Ascent
- Beware of candy ball cannons firing at you while climbing; constant movement is essential.
- Innocuous-looking cherries will bounce you away if you collide with them—steer clear!
- Eventually, you will encounter a frosty yellow jelly. Work together to jump-attack and shatter the candy, enabling you to bounce your way to the peak.

With the five candles lit, the whimsical birthday atmosphere dissipates, heralding the onset of an intense boss fight.
Confronting the Boss: The Dentist’s Nightmare
After lighting the candles, prepare for an unexpected battle as the dentist appears.
1) Phase One: Breaking Free
- One player may find themselves trapped in a chair by the dentist. To break free, wiggle the left stick or press the prompted keys.
- If another player gets caught by the dentist’s drill, dash into them to liberate them.
- The dentist will swing a massive brush across the platform—jump to evade it.
2) Phase Two: The Dentures’ Assault
- The dentist’s chattering dentures will charge at players; keep moving to dodge a bite.
- Upon flipping over, jump-attack the dentures to take control of them.
- Use the dentures to bite one of the dentist’s hands while the other player jump-attacks the immobilized hand to inflict bonus damage.
3) Phase Three: The Cup Trick & Final Showdown

- The dentist traps one player in a cup, shuffling them around, complicating tracking.
- One player will be split; quickly reunite both halves to free your teammate.
- When the dentures flip again, repeat the attack strategy until you can strike the final blow.
- Finish the encounter by pushing the dentist’s drill into his mouth.
With the dentist defeated, proceed through the portal to conclude the Birthday Cake side quest in Split Fiction.
For further exploration — Check out the Split Fiction: Space Escape side quest walkthrough.