Watch Dogs 2 is currently $2.50 on Steam. It's hardly a classic, but it's not terrible either. At one cent per 10 minutes of content, how can you resist? It's only five pleasantly tactile mouse clicks away.Maybe you can't resist. During Steam's seasonal sales it's possible to scoop up dozens of games for less than $5 a pop. Ted Litchfield found 31, many of which could individually keep you occupied...