Fireboy & Watergirl
Light · LEVEL 38 · Verified walkthrough
The Upper Light Vault
Watergirl opens the upper lever, then Fireboy holds the middle pressure plate while the two mirrors send light up to the white diamond passage.
Level objective
Collect all 1 ring-marked diamond, then bring Fireboy to the orange exit in the upper center and Watergirl to the blue exit in the upper center. Both heroes must be at their own doors together.
| Campaign | The Light Temple · 38 of 41 |
|---|---|
| Collectibles | 0 fire diamonds, 0 water diamonds, 1 neutral diamonds. 1 marked diamonds required; 0 optional. |
| Hazards | 1 water pool. Only your own element is safe; purple goo is dangerous to both. |
| Mechanisms | 1 lever, 1 plate, 5 moving platforms |
| Win condition | Collect all 1 ring-marked diamond, then bring Fireboy to the orange exit in the upper center and Watergirl to the blue exit in the upper center. Both heroes must be at their own doors together. |
| Exits | Fireboy: upper center. Watergirl: upper center. |
Step-by-step walkthrough
Move the left shelf
Drag the left optical knob on the bottom tracks to about 79% of its range. The beam should hit the receiver between the two starting positions. Wait for the shelf high on the left wall to move right.
Climb the left-hand staircase
Watergirl jumps left over the small ridge between the starting chambers. Jump onto the small triangular step, then up and left onto the long low shelf. Follow its slope left and jump onto the ledge above. Climb the narrow outer-wall ledges with upward jumps before steering left onto each one.
Reach the upper lever
From the highest narrow ledge, jump up and right onto the lower tip of the upper shelf. Jump right again into the blue pool, then walk right to touch the lever. Turn back immediately so the lever stays on.
Take the middle passage
Walk left off the upper shelf. After landing on the narrow outer ledge, jump right to the inner sloping ledge. Continue right across its edge onto the central gallery and stop on the orange pressure plate.
Bring Fireboy to the plate
Fireboy follows the small triangular step and lower-left shelves. From the ledge partway up the outer wall, jump right to the inner sloping ledge, then walk right into the central gallery. Fireboy takes over the pressure plate; Watergirl moves just to its right.
Aim both reflections
Set the left knob near 60% to send the beam down and right into the second mirror. Set the right knob near 62% to reflect that beam upwards. The upper-right receiver should light while the lever and pressure plate keep the two right-hand panels clear of the light. Wait for the central ramp panel to move right.
Collect the white diamond
Watergirl follows the cleared central ramp up and right. Jump left from its upper end for the white diamond near the ceiling. Return down the ramp to the central gallery while Fireboy continues holding the plate.
Climb to the exits
Either hero can leave first. From the central gallery, move left of the plate, jump up and left onto the small sloping lip, then immediately jump right onto the exit shelf before sliding off the lip. Fireboy stops at the red door; Watergirl continues right to the blue door. Repeat with the other hero.
This route was verified in the game simulation using player controls, required diamonds, and both matching exits. It describes this version’s independently reconstructed room, not an official walkthrough.
How this room’s mechanisms work
Switch 1
upper left
Walk past the handle, or use it nearby: Enter for Fireboy, E for Watergirl, or the touch Use button. Each use toggles it; it stays set after you leave.
Controls Moving platform 1 and Moving platform 2.
Switch 2
middle center
Keep a hero or movable weight on this plate to keep its signal active. Stepping off releases it.
Controls Moving platform 4.
Moving platform 1
upper center
At least one of these inputs must be active: Switch 1.
When powered, it moves right; when power is released, it returns.
Moving platform 2
middle right
At least one of these inputs must be active: Switch 1.
When powered, it moves left; when power is released, it returns.
Moving platform 3
upper right
No switch is connected to this mechanism.
When powered, it moves right; when power is released, it returns.
Moving platform 4
upper right
At least one of these inputs must be active: Switch 2.
When powered, it moves left; when power is released, it returns.
Moving platform 5
upper left
No switch is connected to this mechanism.
When powered, it moves right; when power is released, it returns.
If you get stuck
Check the unfinished objective
Count the ring-marked diamonds still visible. All 1 are required before both matching doors can finish this room; each hero collects their own color.
A gate or platform moved back
A pressure plate releases when its rider or weight leaves. Keep your partner on it until you are safely across. Levers stay set after you leave; check their ON or OFF state before crossing.
You missed a moving platform
Return to safe ground and use the connected switch to bring it back. Board before your partner releases the plate or changes the lever. Avoid jumping into its underside; line up with the open shaft first.
You cannot recover safely
Pause and choose Restart level to reset both heroes, diamonds, weights, and switches. Previously completed levels stay saved. Follow the step order before moving a box or releasing a weight.
For touch controls, jumping, audio, or online connection problems, see player troubleshooting.
Level questions
How do you finish The Upper Light Vault?
Watergirl opens the upper lever, then Fireboy holds the middle pressure plate while the two mirrors send light up to the white diamond passage. Collect all 1 ring-marked diamond, then bring Fireboy to the orange exit in the upper center and Watergirl to the blue exit in the upper center. Both heroes must be at their own doors together.
How many diamonds are required in The Upper Light Vault?
1 diamond: 1 for either hero. 1 ring-marked diamond is required to finish.
Which hazards are in The Upper Light Vault?
1 blue water pool (upper left). Watergirl can enter blue water; Fireboy must avoid it. If either hero falls into a dangerous pool, both players restart the level.
What do the switches do in The Upper Light Vault?
Switch 1 (upper left): Controls Moving platform 1 and Moving platform 2. Walk past the handle, or use it nearby: Enter for Fireboy, E for Watergirl, or the touch Use button. Each use toggles it; it stays set after you leave. Switch 2 (middle center): Controls Moving platform 4. Keep a hero or movable weight on this plate to keep its signal active. Stepping off releases it.