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Zombie Army 4 features 4K 30 FPS or 1080p 60 FPS modes on Xbox One X
Recently, we came across information that confirmed Zombie Army 4 features two different modes on Xbox One X. There's a "Performance" option that lowers the resolution to around 1080p and renders the game at 60 frames per second (FPS). If you choose "Quality," the rendering resolution appears to be 4K, but the frame rate is limited to 30 FPS.