OpenLoco is an open-source re-implementation of Chris Sawyer's
Locomotion (CSL), the spiritual successor to Transport Tycoon. OpenLoco
aims to improve the game similar to how OpenTTD improved Transport
Tycoon, and OpenRCT2 improved RollerCoaster Tycoon.

CSL was originally written in x86 assembly, building on top of the
RollerCoaster Tycoon 2 engine. However, the engine has changed
substantially enough that OpenLoco currently does not share its codebase
with OpenRCT2.

As of December 2025, we have completed reimplementing the game in C++.
It is now our goal to get a solid multiplayer experience working in
OpenLoco. It is also our goal to increase the map and vehicle limits.
However, until creating a new save format (NSF), we are bound to the
limits imposed by the CSL save format (SV5/SC5).