The surge in demand for hydrogen-powered internal combustion engines is propelled by stringent government policies, increasing infrastructure investments, and widespread decarbonization initiatives aimed at reducing carbon emissions globally. These engines are seen as efficient and viable alternatives to traditional fossil fuel-based engines, especially in heavy-duty applications requiring reliability and high performance. Unlike battery-electric vehicles, hydrogen-powered engines enable rapid refueling and extended operational range, making them ideal for long-haul transportation and industrial use. The market is segmented based on combustion technology, with high-pressure direct injection technology standing out for its superior power output and thermal efficiency. Europe leads the global market for H2-ICE engines, with notable investments in hydrogen infrastructure and policies promoting sustainable energy. The adoption of hydrogen engines is expected to rise, particularly in lower horsepower categories, as the world shifts towards cleaner energy solutions to combat pollution in urban areas.