Similar to the XCOM series, you play a commander who sends his team around the globe. The player controls a cell of the Phoenix Point Project, a worldwide organisation created to protect humanity. After the Pandora virus was released in 2022, it decimated the human population down to the last man, leaving only a handful of fragmented groups to defend themselves against the virus.
Phoenix Point is building on top of the established XCOM mechanics and doesn't reinvent the wheel, yet it clearly stands out from the other games in the series - not only in terms of complexity, but also depth.