Break the rules, become a gold trader on MMO Become pro, win tournaments. Or just do something else for money, which is the best option.
create a fansite on your favorite games, ive had some good success int he past with this. include as much quality content as you can, like cheats, walkthroughts, images, character profiles etc.
How 'bout not being an @$$? Where's your helpful response? Not seeing it. And I didn't say a gaming blog w/ AdSense would get him enough money to retire on. If you read the UNEDITED post it says that it could earn him a couple bucks relatively easily. Which is true. He never specified how much money he was looking to make.
There are many ways to earn through games. But you may have to invest a little in the beginning. But better don't go for that. These kinda games make you get addicted with it and will take all of your money.
Also, I've recently seen people make money with http://gold4rs.com/. Personally I don't play Runescape, but if you do, accounts here are going for nice amounts of money....