Here's a game that's really fun to play, but takes a small while to master.
Because I can't remember much about this game, I'll link to the information from Wikipedia.
How to Install:
1. Open the .rar file.
2. Open the folder pr0ctyc00n (or whatever it is)
3. Extract the Roller Coaster Tycoon file (nothing else, not even thinstall)
4. Run the file (as if it was an .iso or something like that).
5. Play (obviously).
the download link