Dino D-Day, NecroVision, or Postal 2 seem like good values for $0.99.
Dino D-Day was $0.49 yesterday.
Possible Risen if you like more RPGish, although the price seems glitched at $-1.71 right now (Free?)
If you already have a GPU and the cost of the CPU is irrelevant then get the FX-8350. The only real reason to consider the A10 is if you are limited in budget or plan on using the integrated graphics. The A10 is closer in CPU performance to an FX-4350.