Alright, another IGN one.
They reviewed Pipe Mania, which I also just reviewed. I read over their review and they refer to it as a clone of Pipe Dream. Funny thing is Pipe Mania IS Pipe Dream, Pipe Dream was just a label applied by the distributor, LucasArts, when the game was ported from the Amiga to a variety of other platforms.
Furthermore, Pipe Dream/Pipe Mania is ACTUALLY INCLUDED in the game as an unlockable! What a disaster, if you are going to make a claim like that you should probably make sure you know what you're talking about...