Constructor sets players as budding property tycoons, who must take on their rivals in the creation of a successful city. This doesn't just involve the speedy building of homes and businesses, however; players must negotiate the tangled web of Undesirables, a motley collection of reprobates that can be used against them – and by them, against others.
The use of Undesirables forms one of the core gameplay mechanics. Whether employing a group of antagonistic Thugs to terrorize a neighbourhood, sending round a Hippy to squat in opponents' empty properties, bringing in Mr Fix It to botch their gas supplies or involving the criminal underworld in your enterprises, there are many tools at your disposal to help hinder your fellow players and make their commercial lives a living hell. Facing a protection racket from the mob? Why not send along a group of maniacal Clowns to terrify your enemy into submission!