
Multiple searches of the toilet or even entire block may be required. A guard searching the toilet may reveal the tunnel regardless of whether it's being actively dug at the time, but this is not guaranteed.Setting up a patrol over a suspected tunnel area can delay escape attempts whilst searches are carried out. Prisoners who know that Guard Dogs are regularly passing over (and detecting) an in-progress tunnel will refrain from further digging attempts until they're sure they won't be detected.Prisoners need the clever trait to dig a tunnel.Already exhausted prisoners will choose to sleep over digging.When starting from a dormitory, multiple inmates can dig together from the beginning. When starting from individual cells, each inmate has to start his own tunnel, and they have to join later.They may, however, share any tools they have during the operation. It will take 4 prisoners to dig twice as fast as just 1 prisoner, and 11 prisoners to dig three times as fast as just 1 prisoner. Each member of a dig team brings diminishing returns to the overall speed of digging, as they cannot dig all at once.Prisoners will cooperate by joining their tunnels and digging together.There is evidence that they will dig under water placed by the Materials menu. Whilst they can dig through pipes, prisoners won't dig through or under natural Water, like ponds or lakes.They aren't likely to dig under another building, unless there's no way to reach the final destination without doing so.If there's no external barrier, they will immediately dig upwards, exit the tunnel and attempt to escape.Prisoners dig the shortest route to the building's exterior, then they continue digging until they meet the outermost fence or wall.Large Pipes will accelerate digging, so placing water pipes under walls is not recommended. Prisoners will avoid walls when possible, since walls slow down digging time.a paper mache decoy) to misrepresent that the prisoner is sleeping in bed. They will only dig at night, and will set up a dummy (e.g.

Prisoners will always start their tunnels from the toilet.knives, forks) can also be used as a tool to dig tunnels. A tool, such as a spoon, is required to dig.Prisoners can start digging a tunnel out of their Cell or Dormitory (not Holding Cells), using the fastest route to the outer-most wall beyond the prison area.A couple of markers placed by a guard dog in the place of possible tunnel.
