In a spirit of holiday gif giving, Good Old Games (GoG) is giving away the Atomic Edition of Duke Nukem 3D. In this classic shooter the world's most badass dude is spewing forth a steady stream of bullets and humorous one liners. Take out aliens for free on both Windows and the Mac OS platforms.

With creative level design, memorable foes, unique weapons, and an iconic outspoken hero, this game is a true monument to gaming fun. The Atomic Edition lets you duke it out even longer, as it contains the bonus fourth episode, complete with a new weapon and previously unseen enemies!

If you've never played Duke Nukem you won't want to pass up the chance to run in guns blazing and showing the world you too can be one cool dude. Hurry while it's free ! While you're there check out the other sales and promotions that GoG is having for the holidays.