NPD Group Inc. this week said Microsoft Corp.’s State of Decay 2 for the Xbox One and the PC ranked as the top-selling software in May at U.S. retail.

In May, State of Decay 2 ranked as the No. 1 best-selling software across all platforms.

State of Decay 2 includes an all-new multiplayer zombie survival world in which users can try to survive solo or build a community to survive together.

The standard SKU sells at $29.99.