Biogas has emerged as a versatile and sustainable energy source, offering a wide range of environmental, economic, and social benefits. It plays a critical role in addressing pressing global challenges such as waste management, greenhouse gas reduction, and energy security. The development and widespread adoption of biogas technologies are integral to the transition towards a low-carbon, circular economy. Environmental sustainability is a central objective in the ongoing evolution of biogas systems, ensuring that their impact on both the environment and society is positive and enduring. Continued advancements in biogas production technologies, combined with strategic investments in research and development, are essential for enhancing the efficiency and scalability of biogas systems. By addressing existing challenges and promoting innovation, biogas has the potential to become a key component of the global shift towards a more sustainable energy framework. This article reviews the key achievements and challenges in the development of biogas technologies, highlighting a selection of technological solutions, evaluating their advantages and limitations, and discussing their potential applications.