We've been playing games online since the dawn of the Internet. However, making real-world money in non-gambling online games is a relatively recent development. But as digital currencies like Bitcoin have begun gaining popularity, virtual transactions of all types — including those in games — are facing more government scrutiny. Because the IRS has been pretty vague about what gamers are supposed to do, we decided to consult an accountant. We were not prepared for the truth: it turns out Uncle Sam doesn't take too kindly to unreported income from hobbies, even virtual ones!