It's never been tougher to pin down just how much a game is worth. Vanquish will last you all of five hours for its $60 entry fee, but is it so much fun that you'll want to play it again and again? Conversely, Fallout New Vegas offers days' worth of content to explore, but is a buggy expansion pack really worth sixty Junior Bacon Cheeseburgers? And why shell out full price for this year's sports title when last year's model is nearly identical and can be bought for a song?

Thankfully, the whole discussion goes out the window when you can play the game for free. There are all kinds of browser games, smartphone apps, and free-to-play platforms out there that offer gaming goodness in exchange for nothing at all. There was a time when free Flash games were horrid experiences, not even worthy of killing time at work. But in the era of aggregate sites, app stores and user ratings, the fun freebies tend to rise to the top of the pile, where cubicle drones between TPS reports are more likely to find them.

I recently played through a few excellent little flash games at Adult Swim's website. Give Up, Robot and Give Up, Robot 2 gave me a few hours of die-and-retry platforming fun, and took nothing in return.