Prison Tycoon 3: Lockdown fits firmly into the more derivative end of the Tycoon bracket. You?re running a business that has a group of customers who require certain services. You build what you can afford, and use the money from doing it well to satisfy new, more complicated desires. The difference, of course, is that your customers are prisoners, requiring outdoor gyms to lift weights in, mess-halls to eat bad slop in and shower rooms to have punch lines to unsuitable jokes in.

Another difference is security. Having a big hole in the fence leading to the outer world, for example, is a bad idea. As you deal with increasingly high-security prisoners, you gain access to things like Dog Squads. Oh - and the Death Chamber.