JGR's OpenTTD Patchpack

The patchpack provides a separate, installable version of OpenTTD that incorporates a wide range of gameplay modifications and quality‑of‑life settings. It is intended for players already familiar with the standard transport‑simulation game and who are comfortable with advanced features, rather than beginners. The collection is distributed as a stable macOS‑compatible package and can run alongside the unmodified game without requiring additional NewGRF, script or mod files.

Key additions focus on rail and road systems, including drive‑through depots, template‑based train replacement, routing restrictions, programmable pre‑signals, realistic braking behavior, and multi‑aspect signal graphics. Road enhancements feature one‑way streets, overtaking rules for articulated vehicles, and refined pathfinding when multiple vehicles target the same station. Various user‑configurable options allow control over signal placement, train speed matching, depot speed limits, and visual information such as wagon introduction years.

The patchpack is documented through a changelog, installation guide, and wiki pages that explain how to use the new features. It is released under the GNU GPL 2.0, with some third‑party components under other licenses, and is supported via a dedicated forum thread for community discussion.