The Indonesia Defence Industry Simulator is a free online text-based experience that immerses you in the strategic world of Indonesia’s defence manufacturing sector. Set against the backdrop of an archipelago nation spanning thousands of islands, this simulator explores the ambitions, challenges, and milestones of building a self-reliant military industrial base. Drawing on the real-world landscape of state-owned enterprises, private contractors, and international partnerships, it portrays the complex interplay between technology transfer, domestic production, export opportunities, and national security priorities. Along the way, the simulation brings to life the engineering rigor, geopolitical considerations, and economic trade-offs that shape how a rising Southeast Asian power develops the capabilities to defend its vast maritime frontiers and its place in the region.