Classic
Original rules of the base game.
Logic / 10 modes
Pipe Connect
Turn the pieces and build a connection without leaks.
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One game. Several approaches.
All receivers
Connect every active pipe to the source without leaks.
Closed loop
All active pieces must form one closed leak-free loop.
Colored flows
Flows 1 and 2 must reach matching receivers. The fixed ↔/↕ bridge has independent channels: crossing never mixes colors.
Portals and converters
Paired P nodes transfer flow. The 1→2 converter changes color; E2 requires color 2.
Hex pipes
Six ports, 60° rotations. Connect every active piece without leaks.
Alchemy flow
Feed one unit each: flow 1 from the left and flow 2 from above into the fixed mixer. Two units of mixture 3 leave to the right for E3. Other inlet ports are invalid.
Assembly kit
Place pipes from a limited kit. Connect all pieces to the source without leaks.
Wrapped network
Opposite edges are paired: right wraps to the same row on the left; down wraps to the top of the column.
Network pulse
Connect a network and time pulses through periodic valves.