Gamebook extraordinaire Tin Man Games has bundled up a bunch of its choose-your-own-adventure games on Android, and is selling them for whatever price you want to pay.
You can pay as much or as little as you like for Judge Dredd: Countdown Sector 106, Slaves of Rema, Siege of the Necromancer, and An Assassin in Orlandes.
If you pay more than the average amount others have spent (currently $6.28) you'll also get Trial of the Clone, Curse of the Assassin, Fighting Fantasy: Caverns of the Snow Witch, and Sultans of Rema.
And if you fork over $9 you'll get everything listed above and new releases Ryan North's To Be Or Not To Be and Fighting Fantasy: Starship Traveller. And if you spend $35 you'll get a t-shirt and badge.
As always with Hunble Bundles, you get to choose where your money goes, and how much goes to Tin Man and how much goes to charities SpecialEffect and AbleGamers. Check it out here.