Which popular First Person Shooter (FPS) franchise, got a Real Time Strategy (RTS) game developed based on its universe?

The popular first-person shooter franchise, Halo, got a real-time strategy (RTS) game developed based on its universe. This decision was made because Halo's expansive and immersive universe offered a rich and diverse setting that lent itself well to the strategic gameplay elements typically found in RTS games. By delving into the Halo universe from a different genre perspective, the RTS game allowed for a fresh and engaging experience for fans, further expanding the franchise's appeal and offering a new way to experience the beloved Halo universe.