Fireboy and Watergirl 4: Crystal Temple Game

Fireboy and Watergirl 4: Crystal Temple is the fourth entry in Oslo Albet's long-running co-op puzzle-platformer series, this time set inside a temple of glowing gemstone caverns. Two elemental heroes move through the same rooms with opposite weaknesses: Fireboy walks through lava unharmed but dies the instant he touches water, while Watergirl swims freely through pools that would kill Fireboy on contact. Every level is built around getting both characters, safely and together, to their own colored door.

The puzzles come from that asymmetry. A switch that lowers a gate for Fireboy might sit across a pool only Watergirl can cross, so one character has to solve half a problem for the . Levers, moving platforms, pressure plates and color-coded crystals — red for Fireboy, blue for Watergirl, green for either — turn each room into a short cooperative puzzle rather than a straight run to the exit. Green pools of toxic sludge are a hazard to both characters and reset the level instantly if either one touches them.

Controls

• Fireboy: Left/Right arrow keys to move, Up arrow to jump
• Watergirl: A/D to move, W to jump

Both characters share the same keyboard, so two-player games work best sitting side by side. Playing solo means running both control schemes with two hands at once.

Tips

• Fireboy can stand in lava and Watergirl can stand in water — use that to hold a pressure plate down or trigger a switch while the character moves through.
• Go slowly the first time through an unfamiliar room. Most deaths in this series come from a wrong step into the wrong colored pool, not from missed jumps.
• If a jump looks impossible, look for a lever or switch you haven't pulled yet — Crystal Temple rooms are usually solved by sequencing switches correctly, not by precision platforming.
• Playing with a second person is easier than soloing both characters. Talk out loud about which crystal or door to head for next.

Crystal Temple suits players who like puzzle-solving more than reflex challenges — it's slower and more deliberate than a straight platformer, and it's built specifically for two people to play together at one keyboard.