RollerCoaster Tycoon

Back in August 2004, a couple months before the release of RollerCoaster Tycoon 3, screenshots of the menu have been unveiled on IGN, showcasing what appears to be an attract mode reminiscent of RollerCoaster Tycoon 1 and 2. When RCT3 became playable to the general public in pressed demo discs in September that year, the main menu played a familiar, catchy tune that has been the default overworld theme ever since, complete with the same video FMV.

Here's the FMV in action in a pre-release build of RollerCoaster Tycoon 3.
 
Come November 2004 with the full game out in stores, and fans were disappointed that the attract mode FMV was replaced with a generic slideshow and many felt that this decision marked the beginning of the downfall.

 
This download serves to restore the functionality of an element that was removed from RCT3 prior to release. However, I had to remove the "Summer Air" audio from the videos so they do not overlap with the music that plays within the main menu separately.
This download is compatible with all versions of RollerCoaster Tycoon 3. Instructions for use appear in the readme file.

A set of custom mortars that allows fireworks. Created by Utregfan123.
Can be found in the mortars section in game.

An angled version of Official Apprentice's Mortar Set, primarily used for water shows. Created by Jaron.
These can be found in the scenery section in game.

A custom mortar set primarily used for water shows. Created by Jaron.
These can be found in the scenery section in game.

A custom mortar set primarily used for water shows. Created by Arknot.
Files can be found in the mortars section in game.

A small pack of some fire effects I created from scratch inspired by ILYxR's version. 

One of my designs that I retrieved from old saves or memory and improved.
POV:
 
This is a coaster that I built on a multiplayer server, but I never got to flesh out the layout nor make any scenery around it. I simply made the first layout and called the coaster Oasis Sprint.
More recently, I wanted to officialize the layout and put the coaster on a proper map with a unique setting and detailed scenery. In order to have the name make sense, the coaster was put on an oasis. A desert plaza was added with shops, a restaurant, a market and backstage areas to make it feel like a park, fill some space and help for maintenance. A few small villages also have been build around, one habited and one in ruins.
I'm not very good with manufacturers and their style, but I wanted a coaster that feels modern but not too twisty, more like CCI (Custom Coaster International) would do it.
This map is done without cheat or custom scenery, but uses features exclusive to OpenRCT2 and the .PARK save format.
See final screenshot for statistics.
I hope you like it. :D

This is the incomplete shyguy's Main Street, including the image pack for use with shyguy's billboard shelves in the Main Street Set 4.

This is Water World, Mr. Wonder's second major park.

This is Circus Center by itself, for those with slower computers.

This is Expo 3000 by itself, for those with slower computers. It includes the new Transport Center.

From the other major timeline park I'm planning on doing, King Kobra opened at Forest Frontiers in 1982 and was, along with Six Flags Darien Lake's Viper, the very first roller coaster in the world to feature 5 inversions. In order, the inversions are:
Vertical loop
Batwing
Double corkscrew
King Kobra thrilled riders until 1999 when it was rather brutally retired by Paramount. The remaining spare parts were used on Valleyfair's Corkscrew, and the land the ride once occupied was used for Top Gun: The Ride (now Afterburner), a B&M Floorless that shares a layout with Scream at SFMM.
 
CS you will need:
Maylene's Classic Corkscrew
JCat's Steelworx

The east side of Wonder World, which includes Expo 3000 and Circus Center. You'll need the Expo 3000 and Circus Center cs sets. (possibly others)

The west side of Wonder World, which includes Alpine Village and Catfish Cove. You'll need the Alpine Village and Catfish Cove cs sets. (possibly others)

This is the first phase of Wonder World, before any custom scenery was used.

Based off this page from the Theme Park Fanon wiki, this is Six Flags Indiana as it appears in 2018, the year before SF randomly drops the ball on what is essentially an elite park for no reason at all. New for 2018 is Total Mayhem, an S&S Free Spin located near Apocalypse.
 
You're going to need the following CS and CTRs:
Six Flags Entrance (IDK who made it sadly)
Nightflight CTR (again, no clue who made it)
JCat's Steelworx
Moby's Steel Jungle
Sanba Balloon
Red Baron
SpaceShot and TurboDrop (maybe by ImagineerJohn? I forget who made them)
That one waterpark CS set that has the tipping bucket (forgot the name)
ATH Catwalks
SafariJ's Arrow Supports
 
And you need Soaked and Wild to open the park. If you have all those, enjoy!

This set contains wooden beams, posts, and braces, log posts and walls, stair covers and other odds 'n ends. This set works well with the Billboard Inserts Set.

This set includes floors, wooden path and pool covers, planter covers, stair covers, wood railings, tropical metal roofs, shutters, slide supports, clapboard walls, windows, and more.

To take the description from another source:
Edit your RCT1 saved games in a new way! You can design new scenarios, generate random terrain maps, modify the research items, change vehicles, etc, etc, etc! This is not a "trainer" - it works only on saved SV4 and SC4 files. You should keep a copy of your original files in case the edits result in RCT not working properly. It is intended primarily for Loopy Landscapes. You will need the Drexler patch for many of the edits to be usable in RCT.

An effect pack containing some effects with colored smoke aimed to use in the daytime. Created by wolfpaw.

An effect pack created for a Rio show that someone had requested. Created by wolfpaw.

The effect pack used to create the show 'Speakeasy'. Created by wolfpaw.

The first (and only) volume of a realistic pyro crafting competition that was held on vPyro. This pack contains all the submitted and winning effects. Effects created by shadowdragons, wolfpaw, Kris, and JBpyrofan.

All effects from the first phase of Ilyxr Dynamics. Effects originally created by AT_Mad.

All effects from the second phase of Ilyxr Dynamics. Effects originally created by AT_Mad.