Amanita Design is hosting a sale for its critically acclaimed PC adventure game and IGF 2009 award winner (for visual art) Machinarium, selling the latest Win/Mac/Linux version of the game and its Tomas Dvorak-composed soundtrack for just $5, a quarter of its usual $20 tag.

The fun part about this deal -- other than the fun you'd have from downloading and playing the beautifully illustrated/designed game -- is that Amanita is presenting it under the guise of "Pirate Amnesty", offering an opportunity for those who downloaded the Machinarium for free to buy a cheap, legit copy.

"We released the game DRM free which means it doesn’t include any anti-piracy protection, therefore the game doesn’t bother players with any serial codes or online authentication, but it’s also very easy to copy it," says Amanita's Jakub Dvorsky.

He adds, "Our estimate from the feedback is that only 5-15 percent of Machinarium players actually paid for the game. If you decide to buy the game, you can be sure you’ll support directly the developers, not any big publisher or distributor."

To keep the piracy theme going, the team produced the wonderful artwork you see above and a special tune. Whether you're a pirate or not, if you don't have a legit copy of the game yet, make sure to take advantage of this 75 percent discount before it ends next Thursday!