It is not possible to play RCT3 without installing it via a disk.
Download it from a CD
at yahoo.com
download free roller coaster 3
you have to download it
You must buy it.
You can download it here: http://download.cnet.com/Roller-Coaster-Tycoon/3000-7551_4-10026882.html for a 40 minute free trial and then you can purchase it for $20.
i dunno if it works but try search Roller coaster tycoon 3 download
There is no Roller Coaster Tycoon 4 instead it will be Roller Coaster Tycoon 3D for the Nintentdo 3DS.
Every higher version of Roller Coaster Tycoon, has more rides, more scenery and many other things.
yes you can go to no downloding .com and click on the roller coaster tycoon button
put the disc in your computer, and then download.
The internet