To unlock coasters you need to complete scenarios in career mode. Usually after each scenarios you unlock 1 coaster type.
do the challenges
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.
To unlock roller coasters in RCT3 you have to complete any scenario to Tycoon. But you could check You Tube for a video that shows you how to get the already made game.
tyco768bins
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complete all the parks that is truly the only way no cheats work i have just about tried them all!!! srry!!!
code fish tycoon
If you can't do that you can only change price for entrance and not for rides, its the scenario.
HEAR A SERIAL NUMBER xa3d-fwp3-ullk-s7j2-etwn-45ul -OR THIS ONE xa3d-fwp3-ullk-s7j2-etwn-45ul
spider=-man
It is already in the game.
You can download some of them or you can do the objectives and unlock them