Gunster: Rain of Bullets/Challenge License Area
From StrategyWiki, the video game walkthrough and strategy guide wiki
There are several challenges to be completed in the Challenge License Area and they must all be completed before you can move on to the mission license area. Remember, you can always come back and try to beat your best times. Don't be fooled by the amazing "best" times; they are all hacked and impossible to beat normally.
