Dope Wars, the (removable) ad-supported classic and addictive economic-sim crime-puzzle.

Good news - you have $2,000 in cash, and licenses to trade. Bad news? You owe $5,500 to Dishonest Harry, a not-too-friendly loan shark, interest is piling up, and he owns a chainsaw! Just sayin'. You only have one choice - dive into the world of wholesale trading of weed, to make money fast and save your skin!