Skill de implementacao real de codigo de engine de jogo — Unity C# e Unreal C++. Cobre padroes de MonoBehaviour, ScriptableObject, object pooling, state machine, ECS, componentes de Actor/UPROPERTY/ UFUNCTION do Unreal, otimizacao de performance (profiling, batching, LOD, culling, garbage collection), e networking multiplayer (cliente-servidor, predicao de cliente, lag compensation, serializacao). Cobertura conceitual de Godot GDScript quando pedido. Nao decide arquitetura de sistema nem balanceamento de numero — para isso ver skill 66. Trigger em: "Unity C#", "Unreal C++", "MonoBehaviour", "ScriptableObject", "UCLASS", "UPROPERTY", "UFUNCTION", "object pooling jogo", "ECS Unity", "otimizar FPS", "profiler Unity", "Unreal Insights", "multiplayer networking jogo", "client-side prediction", "lag compensation", "state machine jogo", "spatial partitioning", "coroutine Unity", "Blueprint callable", "smart pointer Unreal", "implementar sistema de jogo em Unity", "Godot GDScript".