Hacker: Your knowledge of computers, software, and the code used to write it all is vast. Although you are unfamiliar with game play you find it easy to take advantage of the game code to benefit yourself and your comrades. (abilities through lvl-ing of the subclass could include things like temporary stat boosting, gate hacking [getting to secret levels], making items more effective, ect.
RPG Tactician: You know your way around an RPG game for sure. Having logged countless hours on games form every console and system you can play and beat most any RPG with ease. Your knowledge of RPG battles and item usage make you a foe to be afraid of on the virtual battlefied. (bonus to attacks, bonus to defense, make items more effective, stuff liek that).
Walking strategy guide: Do you have anything better to do than play "the world"? No? Well that's the way the company likes it. Your knowledge of "the world" is expansive and through countless mountain dew filled nights you know just about everything about "the world". When someone recommends another game to you, you just laugh it off like they just told you the funniest joke ever. (detect traps bonus, detect enemies bonus, slight bonus to weapon abilities)
This is just a very crude, un thought out system I came up with but it will serve for the basis of my design if I choose to go through with it. Thoughts?
Thanks for your time and opinion /tg/ :]