Puzzle Agent is another one of those Telltale games that I've had in my Steam library for years. Well, it and its sequel, Puzzle Agent 2. They're so similar that the second one is functionally an expansion of the first, so I'm doing them both here. You play as Agent Nelson Tethers of the FBI's Puzzle Research Division. (I half expected him to be British, but he's not.) After getting the call that…