Unlike most App Store promos, Apple has now quietly kicked off one the largest iOS game/app sales we have seen this year. The news comes courtesy of participating app developer Readdle.

The sale includes 100 apps and games at “new low prices”, most of which are $0.99. While we have posted some of these titles over the past week in our daily/game app roundups, this is the first time they’ve all appeared together in one giant sale. Now is your chance to fill up your app library, as we are seeing all-time lows on games, productivity apps, photography apps and much more.

A couple standouts are Pixelmator (Reg. $5), GoodReader (Reg. $5), The Room Two (Reg. $3), Rayman Jungle Run (Reg. $3), BADLAND (Reg. $4), Real Racing (Reg. $5), Angry Birds titles, and well, far too many to mention here. Not even including the insanely popular Angry Birds games, just these apps alone combine for a 4+ star rating from 100,000 reviews.

If there is still a couple apps you can’t find in this sale, then be sure to hit our daily roundups for even more discounted options and the new Free App of the Week. You’ll also find Screenium 3 on Mac for 50% off (Reg. $50) for a limited time.

This week Apple has selected Twisty Hollow as its free app of the week for iOS users. This week’s sale marks the first time the game has gone free since releasing last fall, it typically sells for $3.

Players can follow along as citizen’s battle an unruly self-appointed mayor in this puzzle style game. The imaginative “paper art-style” game pits citizens against government as they try to solve the city’s problems and survive a new regime.

Head below for more details on this game.