...In the far reaches of space, an emergency has occurred at the space station - a passing meteorite has smashed through the facility and fallen into the reactor. While the reactor did not explode, the all-important cooling rods have been breaking one by one, and it's only a matter of time before a meltdown destroys the station. It's now up to you to do what you can to cool the processors so that people can evacuate. Everything depends on you, and you're running out of time!

In this game, "Reactor Balls," you're tasked with setting up balls of one color to create single lines. If a line consists of four or more balls, then the line disappears, clearing crucial space on the board. After the completion of each stage, you can see how many people you've helped evacuate.

The game "Reactor Balls" is a puzzle game similar to the famous game Lines, but the appearance of balls does not depend on the player's actions, and occurs in a specific time. In fact, the rate of balls' appearance constantly increases. Each game is broken into a set of stages, with each being more complex than the previous one, although some respite is given to the player between stages.