Grand Prix Story (3+ weeks)I've put in at least 30 hours into Grand Prix Story since its release on June 9.
Well, 50. Probably.
It has more than stood the test of time, since the last game I played for more than 50 hours was Just Cause 2. It's just completely addictive--highly polished, surprisingly deep, and very challenging.
Like all good resource management games, there are never enough resources to do everything you want. The tech trees are large enough that they can't all be explored, and there's enough variety in gameplay that there's often more than one way to reach a goal. There is also an absolutely amazing amount of detail in the gameworld, all of it charming.
If you have an Android phone, it's a must-buy.