$0.99 Sales to Consider: Isotope, Taxiball, CasterPosted on July 20, 2009July 20, 2009 by arn Here are a few of the latest $0.99 price drops that are worth picking up. Isotope ($2.99 -> $0.99) – One of our favorite Geometry Wars-like shooters that’s a steal at $0.99. [ Full HD version | Low Bandwidth version ] Taxiball ($4.99 -> $0.99) – A tilt and roll game with a nice style and gameplay in which you take fares from one location to another. Caster – ($2.99 -> $0.99) A nice 3rd person shooter.