
Other times one may find that the only route would have required changing the first tile to start the flow in the opposite direction and it is too late by the time the player discovers this. It will sometimes happen that the layout is such that it cannot be solved because all routes to the exit are blocked.
#Bioshock 2 remastered difficulty manual
If the player has a tonic in the Hacker's Delight line, they will get back some/most of the Health they lost on the failed manual attempt. Before wasting a hacking tool, try a manual hack first, even on maximum difficulty hacks. Sometimes a "medium" difficulty hack can be nearly impossible, while a red-zone hack will not be all that hard. The difficulty of the game changes depending on what the player is hacking, how far on they are in the game, what Engineering Tonics the player has equipped and if the device being hacked is frozen (freezing a hackable device significantly slows down the liquid). With a controller, the left analog stick or the directional pad moves the cursor, the A/X button either uncovers a tile or swaps the highlighted tile with the tile that is currently stored in the swap box and the Y/Triangle button greatly increases the flow rate (for when the player has finished solving the puzzle).

With keyboard and mouse, clicking a tile uncovers it, dragging a tile over an uncovered tile swaps the two tiles, clicking the Increase Flow Speed button rapidly increases the rate the liquid flows through the puzzle and should only be used when the puzzle has been solved.

