In Rollercoaster Tycoon, for example, you are responsible for setting the price of admission, hiring staff, and creating fun thrill rides for your customers.
Also known colloquially as OpenTTD for short, Open Transport Tycoon Deluxe is a business simulation game that will look familiar to anyone who has played any of the tycoon-style games in the past, like Zoo Tycoon and Rollercoaster Tycoon.
That aside, there are some good tycoon games.
For example, the park's logo is prominent on Roller Coaster Tycoon 2 games because several parks and coaster designs have been replicated as virtual environments for play.
I remember back in the mid-90s, when I was just a wee lad, I would go over to the neighbor's house and play the old Lemonade Tycoon on their archaic computer.