Mechtropolis

Mechtropolis is the eighth world that the player will naturally encounter during the run.

The Vigilante Droid makes its debut in Mechtropolis, being exclusive to this world. Higher variants of some droid types that appear become even more common, such as the Cryo 3.0 and Pyro 3.0. Xero 3.0s can also appear, but only from Mystery Buttons or if (some) other Droids are rerolled with a Game Die or a Magic Die, or if something is rerolled by a D20 (in this world only).

Environment
Mechtropolis is an urban city street. The floor is a black road with grey walkways at the sides. The brick walls alternate between red and blue. Environmental objects that appear in this world include cars, trash cans and street lamps. This world takes place at night, unlike most others.

Sentries
Some rooms contain Sentries. These sentries are essentially a Rapid-Fire Droid, but they do not aim at a player. Instead, they turn around while shooting rapidly. The direction in which they turn is determined by their color. After the room is cleared, the sentries will deactivate permanently.

Trivia

 * Mechtropolis is a portmanteau of the words "mechanical" and "metropolis".
 * Mechtropolis is the only world named this way.
 * Mechtropolis is the only world you can naturally encounter that does not have more than 1 separate word in the name.
 * The name Mechtropolis, although derived from two words, is technically one word.
 * Mechtropolis is the only world where the color of the walls changes from room to room.
 * It alternates between red and blue.
 * Mechtropolis used to have 10 rooms with enemies, as it was the last world (aside from Null) before the addition of Atomic Factory.
 * Mechtropolis is the last world that naturally occurs at night.
 * Mechtropolis, The Darkness (sometimes), and Mount Whirl are the only worlds with no environmental hazards, if you do not count the sentry as an environmental hazard.