He's asking adults, some whom probably even have their own kids, how he can go under his parents noses to play a video game.
I love Smash, and I want anyone to play it, but he's not my kid. His parents have seen fit to apply the rules they have to him for a reason, so who am I to justify with any rhyme or reason why or how he should break his own parents rules?
It's the reality of the matter, either your parents are strict or they're not. If they don't let you buy games, then you can't buy games. Period. If they do, you'd better exercise responsibility because they can take them away. If they don't then that's how the cookie crumbles. Grow up, get your own apartment, and buy your own games.