Tom Clancy's Rainbow Six Siege

"Team Rainbow has been deactivated since 2012. In their absence, many new terrorist organizations emerged as a result. One such organization, the White Masks, came into prominence in 2015 by spreading chaos all across the world, sharing no discrimination with who they terrorize. With their ultimate objective unknown, they become a large enough threat that Team Rainbow was reactivated." "Attackers start each round with 45 seconds to send a Drone to survey and detect items in the environment, allowing players to find enemies and targets and mark them. Defenders, on the other hand, have the ability to fortify their location and prepare for the inevitable assault by the Attackers. " - Excerpts from the Rainbow Six Siege fandom wiki, accessed September 24, 2020