That's why, the companies that work together are both creditted for publishing and creating these games; e.g. Sierra company and Activision.

So in other words, no man ALONE would make a Spyro game by himself.

But I guess it's possible to hack the game; edit maps, animations, textures, storyboards and manipulations to your own story.

Well, that takes alot of creativity too.

But if you are talking about a flash game, then I do not know. I guess you might look around at the internet for tutorials. I'm just sayin'.