OpenRA

OpenRA recreates classic real‑time strategy titles such as Red Alert, Command & Conquer, and Dune 2000, updating their gameplay for contemporary expectations while preserving the original experience. The engine adds modern mechanics like attack‑move, unit veterancy, and fog of war, and supports online multiplayer, custom maps, and a full mod SDK that lets users build new RTS games or modify existing ones. It runs natively on Windows, macOS, and Linux, offering community‑driven balance updates, campaign difficulty adjustments, and visual enhancements such as HD sprites and effects for specific units and structures. The project is fully open source, with development and testing coordinated publicly, and includes tools like a random map generator and an enhanced map editor to streamline creation of balanced, varied battlefields.