Čistá Čtvrť sewers

The Čistá Čtvrť sewers are an explorable underground part of Čistá Čtvrť, a district of Prague, and are part of the Prague sewers system (Prazska Kanalizace).

Access
The Čistá Čtvrť sewers have three entrances: Notably, however, the sewers do not connect to the sewers underneath the Palisade Property Bank or the bank itself.
 * A manhole in the courtyard behind Tech Noir. The manhole is painted in the style of a casino chip. This entrance leads to an entrance area decorated by rugs.
 * A manhole in the courtyard near Ludvik's Lounge.
 * At the far-east part of the sewers is a broken-ceiling passage that connects to the Tourism Center. During the mission M10: Facing the Enigma, it is possible to escape to the sewers through this route.

Sections
The sewers include the following notable sections:
 * Otar Botkoveli's casino, located at the eastern part of the sewers, near the entrance from the courtyard. This location is featured in the side mission SM04: The Calibrator. Once his mission is active, both Otar and his bodyguard Vano Shetekauri can be found in the casino.
 * A gas chamber, located at around the center of the sewers, used by the Dvali for conducting executions.
 * A gas-filled room located at the southwestern part of the sewers. This room is connected to the manhole entrance in the courtyard near Ludvik's Lounge. A shut-off valve for the gas is located at the bottom level.
 * A large area located at southeastern part of the sewers is being utilized by many residents as their home. The broken-ceiling passage to the Tourism Office is located at the end of the easternmost corridor connected this area.