Apple Design Award sale discounts Threes, Monument Valley, and more

The iTunes App Store is hosting an unannounced sale on several Apple Design Award-winning apps, giving frugal players the opportunity to check out some of the best games to hit iOS devices this year.

Featured games are Asher Vollmer's sliding number-cruncher Threes (99 cents), ustwo's perspective-shifting adventure game Monument Valley ($1.99), and Denis Mikan's touchscreen puzzler Blek (99 cents).

Other award-nominated sale highlights include Tengami ($1.99), Eliss Infinity (99 cents), and Lost Toys ($1.99). There's no word as to when these app discounts will expire, so grab 'em while you can.