Game development is a game development process for certain game platform. The game can be developed for PC, for consoles, for mobile phones, for VR headsets, for smartwatches, etc. You need minimum three workers for game creation (or one combining all these skills): artist, programmer and game designer. But if we delve deeply into an issue of creation process and game support, we'll see more specialists involved here. Every development step or game edit includes community-managers, marketers, analysts, etc. for different tasks: for game development, promotion and support. In comparison with ordinary developers, who design software, the work with game projects is more creative and interesting. 

Game developer is a specialist designing game concept, writing a source code, making visualization and means selection for aims implementation. Game developer can work alone or in team that consists of programmers, game designers, sound engineers, writers, software testers and managers.