Fireboy & Watergirl
Light · LEVEL 21 · Verified walkthrough
The Parallel Run
Follow two similar circuits: Fireboy in the upper half and Watergirl in the lower half. Climb rightward first, drop to the return floor, then jump the goo on the way back to the left exits.
Level objective
Bring Fireboy to the orange exit in the upper left and Watergirl to the blue exit in the lower left. Both heroes must be at their own doors together. The 18 unmarked diamonds are optional; collect every diamond for a perfect clear.
| Campaign | The Light Temple · 21 of 41 |
|---|---|
| Collectibles | 9 fire diamonds, 9 water diamonds. 0 marked diamonds required; 18 optional. |
| Hazards | 6 purple goo pools. Only your own element is safe; purple goo is dangerous to both. |
| Mechanisms | No interactive mechanisms |
| Win condition | Bring Fireboy to the orange exit in the upper left and Watergirl to the blue exit in the lower left. Both heroes must be at their own doors together. The 18 unmarked diamonds are optional; collect every diamond for a perfect clear. |
| Exits | Fireboy: upper left. Watergirl: lower left. |
Step-by-step walkthrough
Jump the first goo basin
Both heroes start at the LEFT of their own circuit. Walk right down the first slope and collect the nearby matching diamond. Jump RIGHT from dry ground over the first purple basin onto the rising shelf, collecting the next diamond.
Loop beneath the central hanging shelf
Continue RIGHT over the small high crest to collect the diamond on its right. Turn LEFT and walk off that crest’s left edge onto the lower U-shaped shelf. After landing, follow it RIGHT and jump for the high diamond near its raised right tip.
Reach the upper-right shelf
From that tip, jump RIGHT again onto the long shelf above. Walk right for its matching diamond, then continue off the far-right end. Each hero now has the five diamonds from the outward route.
Drop through the right-hand shelves
Steer LEFT during the drop to land on the narrow shelf below. Walk RIGHT to its outer tip and let the hero drop again onto the lowest return floor of their own circuit. Do not try to walk straight through the wall beside the shelves.
Jump both return-path goo basins
Head LEFT, collecting the first diamond on the return floor. Jump LEFT over the right-hand goo basin onto dry ground, collect the middle diamond, then jump LEFT across the second basin. The second jump collects the diamond above that basin. Purple goo is lethal to both heroes.
Return to the left exit shelf
Continue LEFT for the last matching diamond. Climb the small left slope and jump LEFT onto the exit shelf. Fireboy uses the orange door in the upper circuit; Watergirl uses the blue door below. All eighteen diamonds are optional, and this route collects them all. If you miss a jump and land safely on a lower shelf, return to its outer end before trying to climb again; restart after a death.
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.
If you get stuck
Check the unfinished objective
The diamonds in this room are optional. If you only want to finish, bring both heroes fully inside their own matching doors.
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 Parallel Run?
Follow two similar circuits: Fireboy in the upper half and Watergirl in the lower half. Climb rightward first, drop to the return floor, then jump the goo on the way back to the left exits. Bring Fireboy to the orange exit in the upper left and Watergirl to the blue exit in the lower left. Both heroes must be at their own doors together. The 18 unmarked diamonds are optional; collect every diamond for a perfect clear.
How many diamonds are required in The Parallel Run?
18 diamonds: 9 for Fireboy and 9 for Watergirl. None are required to finish. 18 unmarked diamonds are optional collectibles for a perfect clear.
Which hazards are in The Parallel Run?
6 purple goo pools (upper left, middle left, middle center, lower left, and lower center). Purple goo defeats either hero. If either hero falls into a dangerous pool, both players restart the level.
Does The Parallel Run need a partner to hold a switch?
There are no levers or pressure plates in this room. Each hero can follow their own route, but both matching exits are still needed to finish.