Train Valley 2 - Passenger Flow is a paid DLC for the base game that adds 20 new levels, 6 locomotives, and a passenger-focused mechanics, often available at discounts on major platforms. The expansion was notably featured for free on the Epic Games Store in July 2023 and frequently sells for around $1.49 on Steam. For more details, visit Steam . Train Valley 2 Passenger Flow DLC Indie Game Review