Sometimes you have to connect your game to other servers to public. If that doesn't work restart the game and try it again.
The only ones i know are roller coaster tycoon 1, 2, or 3, and Thrillvile.
There is no unlock code for Roller Coasters in Tycoon 3. To unlock the roller coasters you must go into career mode and complete the scenarios.
Yes, In RCT3 all Roller Coasters have pre-made coasters, with varying Price, Length, Excitement rating ETC
No, on Chris Sawyer's webpage (The designer) he says that cheats don't exist in the first Roller Coaster Tycoon.
The Deluxe edition of RCT3 is available to download from Game.co.uk for £15.
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.
Platnum gives you access to Roller coaster tycoon 3, Roller coaster tycoon 3 WILD, and Roller coaster tycoon 3 soaked, If you just buy gold you cannot do anything on roller coaster tycoon 3 WILD like have a zoo and the WILD themed stuff such as deco's and rides.
Not that I know of but there is roller coaster tycoon 3.
you go to tools and it shows you a few different tools click on peep designer
All Roller Coaster Tycoon games are computer games
You can buy roller coaster tycoon for Mac. It's 49.95