I'm just going to go out and be a dick here. If you're an adult, consider yourself a gamer, and you have never beat a game, then there is something wrong with you. I admit there are still many games I have not beaten to this day; The Legend of Zelda, any Sonic game except for Sonic Adventure, Blaster Master, Super Mario RPG. A little bit of passion for a particular game is needed, overcoming game overs, and picking the controller up to see how much farther you can get.