Open source is more than just a trend in software development; it is a movement that is fundamentally changing how games are created, shared, and experienced. Open source principles empower developers and communities worldwide to collaborate, innovate, and address challenges in gaming software. From robust engines to vibrant player-made modifications and heightened transparency, the ripple effects of open source are visible across the industry. This page explores the transformative impact of open source on the future of gaming software, keenly examining openness, innovation, community, and sustainability.