RollerCoaster Tycoon/Trinity Islands

Walkthrough
The terrain of Trinity Islands can look very intimidating with its uneven hills, abundance of trees, and lack of land to work on with no way to buy more. However, by carefully managing what space you have and keeping the rides close together, reaching 750 guests in three years should not be difficult at all. The key is to build at the entrance and work toward the next island while keeping guests happy with a variety of rides.

To start, it's recommended that access to the other two islands should be blocked until you have enough funds to place rides at those areas. People that are bored and want to go home will impact your rating negatively. Place benches and bins on the paths. Research is already set to maximum, so have researchers focus on roller coasters since you only have one available. Once you have the Steel Roller Coaster, shift your research to thrill rides since you only have Scrambled Eggs.

There is space just north of the park gate for a roller coaster, but you'll have to be tear down a few trees resting on a tiny plot of land. Moreover, turning on underwater view will show how close the border fence is to the land above it, so it's not possible to build far out into the water. Since the park only has a Steel Mini Roller Coaster available, you can use its flexible nature to weave around tight areas and itself. It's ability to have chains on turns can also keep it compact. Gentle rides can be placed on land or on top of the water with no trouble other than the occasional tree. Just place down a Carousel or a Scrambled Eggs ride as well as a Boat Hire to take advantage of all the water. Make sure to have the Boat Hire's track go a considerable distance along the shore or even near other rides to boost its excitement rating. Incidentally, you don't need to even have a complete circuit for a boat ride, but guests will wander around the waters aimlessly until they make it back to the station. It's best to do this if the ride is placed in a very small body of water and even then, it may not ensure all riders will return on time.

The islands are all connected by one path, which can tire your guests out due to the distance, so connecting the first and third island is recommended. You can make a simple bridge using pathways or build a Chairlift system. There are benefits with using a transport ride, the biggest being that you can charge people to go from one place to the other. However, the Chairlift can only hold up to 24 people, giving it the smallest maximum capacity compared to other transport rides. If you decide to go with the latter, keep the queue lines small.

As for the other two islands, building on them can be a little more challenging compared to the initial island. The northern-most one is basically a giant hill with lots of trees and only one flat beach area at the east. It's recommended to just build along the path as tearing down those trees and flattening the land is far too expensive. The eastmost island is flat but has just as much trees as the previous one. Use the land wisely for rides that need stable land to start with. As soon as all three islands are accessible and equipped with rides, the objective should be reached with minimal problems. If there's still not enough people, you can build a roller coaster in the space between the three islands as there's plenty of room in the waters.

Available Items

 * Transport Rides: Chairlift
 * Gentle Rides: Car Ride, Haunted House, Merry-Go-Round
 * Roller Coasters: Steel Mini Roller Coaster
 * Thrill Rides: Scrambled Eggs
 * Water Rides: Boat Hire
 * Shops & Stalls: Bathroom, Drink Stall, Ice Cream Stall
 * Scenery & Theming: Default Theming Objects

Researchable Items

 * Roller Coasters: Suspended Single Rail Roller Coaster → Mine Train Roller Coaster → Steel Roller Coaster → Wooden Crazy Rodent Roller Coaster → Inverted Roller Coaster → Suspended Roller Coaster → Bobsled Roller Coaster → Single Rail Roller Coaster
 * Thrill Rides: Log Flume → Swinging Ship → Water Slide → Swinging Inverter Ship → Go Karts → Motion Simulator → Gravitron
 * Gentle Rides: Ferris Wheel → Spiral Slide → Hedge Maze → Miniature Railroad → Monorail → Observation Tower → Space Rings
 * Shops & Stalls: Information Kiosk → Fries Stall → Pizza Stall → Balloon Stall → Cotton Candy Stall → Burger Bar → Souvenir Stall → Popcorn Stall
 * Scenery & Theming: Mine Theming Objects
 * Ride Improvements: Canoes for Boat Hire → Spinning Cars for Steel Mini Roller Coaster → Log Cars for Steel Mini Roller Coaster → Swan Pedal Boats for Boat Hire → Rocket Cars for Steel Mini Roller Coaster → Backwards Roller Coaster Train for Steel Roller Coaster