It includes 3 games code a shopping system and many other codes used for teaching.

源码中包含有3个游戏代码，一个购物系统代码还有其他很多学习用例的教学代码！

youdao

There was Gameshark, a legal device sold to hack your games and create codes within them.

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Aitcheson not only codes his games, but also produces the art and every other asset he can, keeping costs to an absolute minimum.

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The Grapevine, Texas, company also has begun selling codes for additional content for existing games, such as extended stories and extra maps.

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