2.) Spelunky Spelunky isn't the newest game on this list by far, but it's one I still find myself coming back to again and again. If you crossed the Indiana Jones films with a heavy dose of 1980's 8-bit pixel art, Spelunky is what you'd get. Monsters, traps and maze-like caverns stand between your whip wielding avatar and massive piles of gold and jewels. The map is randomly generated every time you start a new game, meaning there's always a new dungeon to go exploring through. Good thing, too, since the game's fairly brutal difficulty level will have you starting over often. There's even an HD remake that came out on July 4 for Xbox Live Arcade, but it's not free. Grab Spelunky for free HERE.
3.) Capitalism Online I'll admit it: this one's a bit nerdy, even for me. If anyone out there remembers the old PC game Capitalism, then you already know exactly what Economies of Scale is all about. After creating a character you can own your own company, build stores and factories, conduct research and development and more to amass piles of cash. Putting it online and making it free means there are tons of other players out there competing against you in the market, making your opponents far more cunning than playing against the AI back in the old days. The game only recently launched and they're still working on smoothing out some of the rough edges, but they're mostly just cosmetic issues at this point. If you ever wanted to try your hand at being Rockefeller or Trump, now's your chance.
Get Capitalism Online HERE.