OpenTTD Overview
OpenTTD is a free, open-source business-simulation game for Windows, macOS, and Linux, an open-source remake and expansion of the classic Transport Tycoon Deluxe. You build and run a transport company, constructing road, rail, water, and air networks to move passengers and cargo between towns and industries, competing to grow the most profitable empire. It greatly expands on the original with larger maps, more vehicles, multiplayer for up to many players, and a huge ecosystem of community add-ons (new vehicle sets, industries, scenarios, and AI opponents). Its depth and replayability have made it a beloved long-running open-source game. The full offline installer bundles the complete game and installs without an internet connection. It includes a built-in scenario editor and supports both freeform sandbox play and goal-based scenarios. This page links to the official OpenTTD download.
