Such events can vary from sandstorms to assaults from a swarm of locusts. Another new addition are the dynamic events, which can be triggered by the player on the map. Each of these formidable opponents, as Slave King, the Shah, and Sultana, have a unique battle strategy, units, and settlements. Stronghold 2 introduces new units, as well as AI characters. The game retains some of its predecessors' aesthetics, such as tile-based movement and construction. The maps and units come to life on the screen in full detail. The key feature that differentiates Crusader 2 from the first installment of the series is the transition from 2D into 3D rendering. Other features of the gameplay include improved enemy AI, dynamic events occurring on the game map, and others. Unlike its predecessor, game features a 3D graphics engine, rendering the environments and units with great detail. Stronghold Crusader 2 is a real-time strategy game, developed and published by Firefly Studios.