Nelson Tethers: Puzzle Agent is a Puzzle game developed by Graham Annable and published by Telltale Games. It was the first game released under Telltale Games pilot project, and was released on June 30, 2010.

Nelson Tethers is an agent in the obscure branch of the FBI, being given a first field assignment to the town of Scoggins, Minnesota. He is sent to resolve the issue at the eraser factory, since the inquiries into the closure were being replied with by puzzles.