HGU: Hazardous Gas Unit

A bomb containing toxic gas has been planted in the basement of a building in the city. If the gas escapes, there will be untold consequences, so the gas must be funneled to the roof of the building where a disposal unit awaits to safely destroy it. Hazardous Gas Unit is a puzzle game very similar to Pipe Dream. The player must place pipes for the gas to travel through in order to reach the vent to the next level, leaving no parts of the path uncapped and allowing no gas to escape. If the gas reaches an area not covered by either a pipe or the outer wall, the stage is failed at must be retried. There are 23 levels of increasing complexity.