I've found some game apps on AppPicker website these are gone free. You also can check them on AppPicker.
Here is the list:
- Juicy Fruit Popper - Zap, Pop and Juice the Fruit! $2.99 to free
- Dodge The Spikes $3.75 to free
- Rune Gems $0.99 to free
- Office Story $0.99 to free
- Stuck in the Dark $1.99 to free
good luck:-)