Go out and join clubs. It can be a frat, band, student council, DnD group, whatever. Go join a club or clubs and have several groups of friends. A big part of the college experience is the social life, do not miss out on that. You don't have to go out and get hammered every weekend or even drink at all if you don't want to but be social.
Next piece of advice-- go to class. I'll say it again because it's important-- go to class. Also, less important but still important, do your homework. You're completely on your own now and it's tempting to skip those early classes and put off studying but absolutely do not do that. It's fine to skip the occasional class and there are some classes you don't need to show up at all, but in general go to class and do your homework (even if it's optional). I wasted my entire freshman year because I didn't go to class and nearly didn't graduate on my second senior year because I didn't study or do my homework.
Finally, on what you want to do-- it's cool to not know what you want to do your freshman year but get it figured out by the end of your freshman because you will get dangerously close to wasting time and money. If game development is what you want to do and you aren't a programmer or artist, be a designer. The great thing about designers is they can come from any background and do well. Take some history classes and then take some architectural classes as electives. Psych and philosophy? Sure! While you're at it, take an intro to programming and a basic life drawing classes, they all can only help. Take full potential of your electives. Once you get some degree, go to one of the game development grad schools like The Guildhall. Also, make sure to download something like Unreal III and just start making levels. They don't have to be good right at the start, just make levels. Find a mod community, work through tutorials, and then make levels. Once you have a good handle on Unreal, then start working with other engines (for instance, The Elder Scrolls Toolkit since you like RPG's).
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Oh, and the person who said get to know your professor's gave excellent advice. Talk to them often, ask them questions during their office hours (even if you really don't need to), don't be annoying about it, and make sure they know your name. It becomes a lifesaver and they may be able to give you very valuable advice on what you want to do with your life.
