If you've still not tried one of the best ambient "chill-out" games out there, Osmos HD, and you don't use the Amazon App Store, now's your chance. The game's developers at Hemisphere Games have put Osmos HD on sale for just $0.99 (that's two dollars less than its normal $2.99 price) in celebration of the vernal equinox today. The sale will last for an un-quantified "few days."

For those who haven't heard of Osmos, it's an ambient game that could almost be considered a classic for the Android platform. The general idea is that you are a small blob, navigating through the "Blobiverse," soaking up smaller motes, while avoiding larger, more dangerous life forms. The game is absolutely beautiful and elegantly-executed. What's more, the soundtrack is enthralling, beautiful, and calming.

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Osmos HD is, without question, the most serene experience $0.99 can buy you. If you've been waiting for the game to hit a low price before buying, hit the widget below.