Master Negotiator Achievement
Sign a 1st line Forward, a Top 2 Defenseman or an Elite Goalie during Free Agency in Be A GM mode.
Start a "Be A GM" season, and make sure that the salary cap is off. Simulate through the first season. Once the Free Agency period (July 1st) arrives, go to Trade & Improve to find the Free Agency and sign Steven Stamkos.
In any case, you can sort players by their potential by clicking .