The Assembly Line developed the DOS puzzle game Pipe Dream in 1989.
Pipe Dream is currently abandonware, runs on DOS and can be played in a top down perspective in single player, multiplayer (same or split screen) modes.
It's available for download.
All screenshots were taken by Abandonware DOS.
The Windows version of the game was included in the MS Windows Entertainment Pack. In 1990 it was released as an arcade game by Japanese manufacturer Video System Co. Ltd., though with slightly altered gameplay, giving the player the task to connect a source and drain with the random pipe pieces.
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