Addictive app towers above the rest

Clear-cut and challenging, Fieldrunners is the best of the crowded “tower defense” genre of iPhone apps. The $2.99 game is set in World War II, and requires players to construct machine-gun turrets and cruise-missile stations to guard against enemy soldiers that run left-to-right across your battlefield screen. Fieldrunners is great for Saturdays, as you’ll spend hours and hours playing this addictive game.