FreeRCT
ActiveSemi-playableWebWindowsLinux

About
FreeRCT aims to capture the look, feel and gameplay of RollerCoaster Tycoon 1 and 2. It's written in C++17, officially supports Linux (Windows and macOS are reported to work), and can also be compiled to WebAssembly for browser play. Status is semi-playable.
Getting started
Install the required dependencies (libpng, GLFW3, GLEW, Freetype, CMake) and build with cmake/make, or use the project's Nix flake, then run the resulting freerct binary. An optional freerct.cfg file next to the binary can set the font and language.