what do you mean by game art? I think what you will find that artists in the games industry came or come from a self taught and a learned training by doing a fine art degree. If not a fine art degree then they had taught themselves and collaborated with other artists.
Simply search the web for freelance game artists and write to them to ask them what you should do to achieve a career in the games industry. what you will find is that there are no short cuts.
Why not write to the games companies and ask their advice? Many will be willing to tell you what skills or capabilities you have to develop, there are also the portafolio websites of many game artists that you can look at and you will see from the work they produce what you have to achieve.
hope this helps
