TEENAGENT (or Teen Agent or however you want to spell it) is a fun, if sometimes frustrating, point-and-click adventure game in the vein of the old LucasArts and Sierra games.
Players take control of Mark, a teen pulled off the street who has been given the task of investigating some strange occurrences for the RGB, a super secret government organization.
It follows the standard pixel hunt, trial and error system that really defines the genre, and overall does a good job with it. At times the one spot on the screen you're looking for is a bit harder to find than it really should be, or the solution to a puzzle really doesn't follow any coherent train of logic, but those moments are few and far between and don't detract too much from what is otherwise a solid edition to GOG's catalog.
Especially when you consider that the game is free, there really isn't a reason not to give it a shot.