Home Slickdeals Gamestop 50% Extra Trade-in Credit for Controllers, Accessories, & Headsets. Also... Slickdeals Gamestop 50% Extra Trade-in Credit for Controllers, Accessories, & Headsets. Also 30%, 40%, 50% Extra Trade-in Credit for multiples of 3, 4, 5 games. By ARCOM - 4 October 2021 34 0 SHARE Facebook Twitter Go to the deal page: Gamestop 50% Extra Trade-in Credit for Controllers, Accessories, & Headsets. Also 30%, 40%, 50% Extra Trade-in Credit for multiples of 3, 4, 5 games.