ABSTRACT
The definition of what constitutes an engine varies across the industry. At its most basic, the term describes a code base that provides common functionality across multiple projects. The aim is to share the cost in resources required to develop this functionality. More advanced engines provide a platform and tools that can have a substantial impact on the game development process. The architecture of an engine determines how flexible, functional, reliable, and extensible that engine is and thus how successfully it can be used across multiple projects.
