How to Build Underground on Roller Coaster Tycoon 3

By Aaron Kopf

Updated September 22, 2017

Items you will need

  • Roller Coaster Tycoon 3

  • Roller Coaster Tycoon 3 Soaked! expansion pack

Like this, only underground
i roller coaster image by jc from

Released in 2004, Roller Coaster Tycoon 3 allows players to create and manage every aspect of their thriving amusement park, from the positioning of foliage to the speed of the roller coasters. The expansion pack, RCT3 Soaked!, features new water rides and the ability for players to build underground. Players can build shops, paths and even thrilling roller coasters under the green grass above.

Install Roller Coaster Tycoon 3: Soaked!. Restart your computer after installation.

Execute RCT3: Soaked!.

Open a previous park or create a new one.

Create a single attraction so guests will begin walking through your park. This attraction can be a food stand, a cheap ride or a kiosk.

Rename one guest "Mornington Crescent." Doing so allows you to lower any object underground by pressing the "Shift" button.

Build your roller coaster as desired. If you need more cash, rename another guest "John D Rockefeller." Doing so will add $10,000 to your account. Repeat as necessary.

Click one of the roller coaster supports and press "Shift" several times. Your coaster will start descending underground. Press "Shift" until your coaster is at the desired depth.


You can use this technique with any structure. Make your underground roller coaster even more thrilling by descending pyrotechnics or foliage against the track.

Some players have a difficult time building the entire coaster underground and usually place the boarding section on the surface.