Walmart Stores has a proposition for anyone with copies of Call of Duty and other old video games lying around the house: Trade them in for store credit to spend on other items.

Walmart, the country’s largest retailer, is expected to announce on Tuesday that starting March 26 it will begin allowing customers to convert old games into store credits in over 3,100 Walmart stores nationwide, most of its locations in the United States. The program represents a major push by Walmart into a lucrative segment of the games business, one that games publishers have unsuccessfully sought to stymie in the past because of the potential threat used games represent to new game sales.

The trade-in plan is an expansion of a program through which Walmart gives customers credits for used tablets and smartphones that they can apply to new devices. The retailer is betting that it can stimulate sales of new items by giving people a new currency in the form of their old purchases.

“We see this as an opportunity not only to grow our total market share, but to provide access to customers where they may not have had it before,” Duncan Mac Naughton, Walmart U.S.’s chief merchandising and marketing officer, said in a conference call.