Fireboy and Watergirl 2: Light Temple is the second entry in the cooperative puzzle-platformer series that became a co-op classic for a reason - two characters with opposite elemental traits navigate a temple full of puzzles that require both of them working together.
Fire collects red gems but dies in water; Water collects blue ones but extinguishes in fire. Cooperation isn't optional, it's the whole game.
Levels are built around the asymmetric capabilities. Fireboy can wade through lava that would kill Watergirl. Watergirl can cross water pools that would douse Fireboy.
Many puzzles need both characters to coordinate - one stands on a switch that holds open a door for the other, then they swap roles to advance further. The asymmetry is the entire game.
This sequel adds light beam puzzles - mirrors and prisms that redirect light to power doors and platforms. Positioning these elements correctly while moving both characters through the level is a layered challenge that the original game didn't have.
The Light Temple variant is widely considered one of the more interesting in the series.
One person can control both characters with two sets of keys (WASD + arrows is the standard layout), or two people can share a keyboard for true cooperative play.
The game is designed to be playable solo with practice, but it shines when you've got a friend or family member sharing the controls.
The game runs in any modern browser via HTML5. No install, no plugin, no account needed. It runs on Chromebooks, school computers, library PCs, and modern phones or tablets.
Two-player local co-op works best with a full keyboard; mobile single-player using touch is possible but coordinating two characters via touch is genuinely harder than keyboard.
Watergirl: WASD to move (W to jump). Fireboy: Arrow keys to move (Up arrow to jump). Both characters need to reach their colored exits to complete each level.
Watergirl can collect blue diamonds and walk through water; Fireboy can collect red diamonds and walk through fire. Neither can touch green slime - that kills both.
Coordinate to step on switches, push blocks, and redirect light beams (in this Light Temple version) to clear obstacles.
Plan Both Routes Before Moving - Looking at the level once with both characters in mind beats running one of them blindly into a hazard.
Use Pause to Strategize - When the puzzle is complex, pausing lets you map out what each character needs to do without time pressure. Light Beams Need Aiming - The mirrors in Light Temple rotate; experiment with angles before committing to a configuration.
Don't Forget Diamonds - You can finish a level without collecting all gems, but completionists chase the full set; some require careful coordination.
Switch Order Matters - When both characters need to step on switches in sequence, the order often determines whether the puzzle solves; if one approach fails, try the reverse.
