You really need a lot of ambition, in addition to some coding skills. I understand it's not something you can necessarily learn. Nonetheless, your io games fire will be fueled primarily by determination and enthusiasm. Along with ambition, the skills required include a solid working knowledge of some coding. Of course, knowledge and proficiency in C++ and C# are essential. However, if you are unfamiliar with either of these programming languages, use your insatiable curiosity to learn!