Roller Coaster Tycoon is a game that is focusing on building an entertainment park. You can build your own themed park, rollercoaster, go-kart track, and many more. This game is released years ago and now the price has been dropped. Being low-priced doesn't always mean bad games. I played this game for months a few years ago. It has free mode where you can build your own dream entertainment park. Or you can play in mission mode in which you have to meet the requirements for each level.