The "Humble Indie Bundle," a pay-what-you-want deal that lets you snag a handful of indie computer games for one low price, just got a little sweeter.

If you pause the Humble Indie Bundle promotional video at the 1:17 mark, you'll find a hidden promise to release the source code for Gish, Penumbra and Legaru if gamers contribute a total of $1 million in sales by the time the deal closes in the next 21 hours.

Will it happen? The Humble Indie Bundle has already raised over $773,000 as of this writing. The deal lets gamers name their price on a download package of DRM-free games for PC, Mac or Linux that also includes World of Goo, Aquaria, then decide whether the money goes to Child's Play, the EFF, the indie gamemakers, or all of the above.

On Monday, Amanita Design added its eye-popping game Samorost 2 (pictured above) to the Humble Indie Bundle. Anybody who already bought the bundle can now download the full version of Samorost 2 as part of his initial purchase.

Image courtesy Amanita Design

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