Dr. Eureka

To set up the game, shuffle the challenge cards and place them in a face-down deck. Each player takes three test tubes and places them in front of them. Next, every player loads their tubes with two balls of each color, distributing them from left to right so that each person starts with two purple, two red, and two green balls. Once everyone is ready, the top card of the deck is flipped face up to reveal the starting experiment.

The main objective of Dr. Eureka is to act as the doctor's brilliant apprentice, racing against opponents to solve scientific formulas by successfully moving colored molecules from one test tube to another. The goal is to be the cleverest and speediest scientist in the lab by being the first person to claim a total of five challenge cards.

During a turn, all players simultaneously race to recreate the exact combination shown on the face-up challenge card by pouring balls between test tubes. You may flip tubes upside down or rearrange their order in a line, but you must strictly follow the rule that hands cannot touch the balls. If you drop a ball, touch it with your hand, or mistakenly claim victory when your setup is wrong, you are instantly eliminated from that round.

Scoring happens as soon as a player finishes arranging the test tubes and balls to match the card from left to right and top to bottom, shouting Eureka. If opponents verify the solution is correct, the player takes the challenge card as a point. Balls stay in their current positions for the next round, but all test tubes must be reset upright.

The game comes to an end as soon as one player successfully claims their fifth challenge card. That player is immediately declared the winner of the game and crowned the top scientist of the laboratory.