Games that are of the same cast pretty much all work the same way. For instance, all first-person shooters like Doom need code that does in effect the same set of tasks. All side-scrolling games, such as the old Super Mario Brothers or Sonic the Hedgehog, also use code that does in essence the same things.
To make game programmers’ lives less stressful, other programmers often develop game engines. A game engine performs the most accustomed tasks that a particular type of game does. For example, a game engine for first-person shooters handles all of the tasks associated with displaying scenery, drawing bad guys, and so forth. You have to place your own scenery, code for your weapons, and any other code that is definitive to your game. The game engine handles displaying buildings, trees, and things like that.
Game use game engines to get their work done. Game engines, in turn, use graphics libraries to do all of their drawing. If you have a game engine and a graphics library, it saves you from writing a great amount of code. All you have to do is add your game code on top of the game engine. That’s the only part of the game that you have to write. Take my word for it; that’s all you want to worry about. You’ll find writing your game code energizing enough.
Varied types of games each need their own game engine. So you may run across game engines that are for first-person shooters, others that are for flight simulators, and so on. The best game engines are specific enough to be used for more than one type of game. Many excellent game engines are available commercially. The people who write them usually direct you to buy the engine or pay a royalty when you sell your game. Some ask both.
Interested in learning more? You can discover a wealth of information at interactive virtual environment or even browser game engine