Yes, that's right, you can earn money by playing online games!
The main game is a MMORPG (massive multiplayer online role playing game) called Second Life.
You can buy and earn in-game currency and then exchange it for real life cash.
For example, you could put some $ in and get some currency in-game.
This can be spent to build ANYTHING. From casinos and shops to public pools and even strip clubs.
Lots of money can be made out of these. Best of all, the game is free to play so there is no subscription required.
How easy!
Hoever, I suggest you play the game for a while first, it is free to download and play and it still a great game.
Then, once you get to know the market. It's time to earn some dosh!
Good luck and happy gaming :)