Fireboy and Watergirl 1 The Forest Temple chapter walkthrough for solo play teaches three repeatable habits. Park the active character on safe ground, switch to the idle character to clear the next hazard, then return to the original character. Use a box on a pressure plate when both characters must hold the door open at once. Pick up the water-safe diamonds first with Watergirl, then the fire-safe diamonds with Fireboy, and the green gems last on the levels where they appear. The Forest Temple chapter has about 30 levels from the 2009 Oslo Albet Flash original and the Steam release reuses the same chapter.
Solo park-and-switch rhythm
The Forest Temple chapter for a solo player runs on a park-and-switch rhythm. Move one character to a safe tile and stop, then switch to the other character and clear the next hazard or pull the next lever, then return to the parked character. The keyboard layout is Fireboy on WASD or arrows and Watergirl on arrows as the paired second player on one keyboard; solo players swap which character responds to which key by stepping away from one side of the keyboard before pressing the other side's keys. The reason this rhythm works is that most Forest Temple puzzles split the screen into a Fireboy side and a Watergirl side; the first character parks just past the hazard they can cross, and the second character crosses the opposite hazard from the other direction. A common mistake is to try to keep both characters moving at the same time; if both characters move together they almost always collide with a hazard or arrive at a switch at the wrong moment. Park, switch, clear, return is the only rhythm that survives a simultaneous-button trigger without a second human player.
Box-as-pressure-plate holds
When a Forest Temple door is opened by a pressure plate and a single player has to cross that door alone, push a movable box onto the pressure plate to hold the door open while the same character crosses. This is the standard box-as-pressure-plate hold for solo play. The technique works because the box stays on the plate after the character steps off, so a door that would normally snap shut the moment the character leaves the plate stays open until the box is removed. The sequence is: walk one character up to the box, push the box toward the pressure plate, keep pushing until the box sits on the plate, then walk the same character through the door the plate was holding open. After the character is on the other side, leave the box on the plate and switch to the other character to collect diamonds or open the next route. The same pattern works in reverse: pull a box off a plate to close a door behind a character, or stack a box on a plate to keep an elevator up while the other character crosses. Box-as-pressure-plate holds are the single biggest solo-play shortcut in the Forest Temple chapter because they convert simultaneous-button cooperative triggers into single-character puzzles.
Diamond and green-gem pickup order
Plan the Forest Temple chapter diamond and green-gem pickup in a fixed order rather than chasing gems in the order they appear. Step one: collect every water-safe (cyan) diamond with Watergirl first, because water-safe diamonds sit on tiles only Watergirl can stand on and a single Fireboy attempt will kill the run. Step two: collect every fire-safe (red) diamond with Fireboy second, mirroring the same logic on the fire-tinted tiles. Step three: collect the green gems last, because green gems sit in the harder-to-reach nooks of the Forest Temple chapter and picking them up after the diamond quota is complete lets the player ignore the green gems until the chapter-perfect ending is already locked in. The level exit only opens once the per-level diamond counter is full, so the order above guarantees the exit is open before any green-gem attempt. If a green gem is sitting on a hazard tile, do not try to pick it up with either character directly; route the active character to the box-on-pressure-plate hold described above, drop the box on the plate, and pick up the green gem while the box holds the safe tile open.
Solo-run reference sections
Levels
Forest Temple chapter level order and diamond gating.
Diamonds
Water-safe, fire-safe, and green-gem color rules.
Element Traps
Fire, water, green goo, poison, and lava mechanics.
Controls & Co-op
Keyboard, controller, and simultaneous-button triggers.
Achievements
Complete all the levels and Get all the green gems.
How to Play Online
Steam Remote Play Together as the online co-op workaround.
FAQ
Can I play the Forest Temple chapter alone?
Yes. Solo play uses the park-and-switch rhythm, box-as-pressure-plate holds to bypass simultaneous-button triggers, and a water-safe / fire-safe / green-gem pickup order. See the chapter walkthrough for the full method.
How do I unlock the perfect ending?
Collect every diamond (gem) in each Forest Temple level before reaching the exit; water-safe and fire-safe diamonds require Fireboy and Watergirl to work together.
What are the element trap rules?
Fireboy fears water, Watergirl fears fire, and both characters fear green goo, poison pools, and lava; simultaneous-button cooperative triggers require both characters on switches at the same time.