Call of Duty is a first-person shooter video game franchise published by Activision. Starting out in 2003, it first focused on games set in World War II. Over time, the series has seen games set in the midst of the Cold War, futuristic worlds, and the modern day. The games were first developed by Infinity Ward, then also by Treyarch and Sledgehammer Games. Several spin-off and handheld games were made by other developers. The most recent title, Call of Duty: Modern Warfare II, was released on October 28, 2022.
Because it has just enough complexity to keep its players coming back but it’s simple enough that anyone can pick it up, play it, and understand it after only a little time. Call of Duty doesn’t look all that complex. It’s running around a map with guns and sometimes high explosives, killing and getting killed while sometimes standing near an objective. That’s not very complicated. However, there is room to learn more all the time, and to learn personal preferences. Maybe it’s figuring out the spawns or where to throw grenades. Maybe it’s figuring out that you like using a suppressor on your HVK-30. Also, the campaigns are fun, (usually) mindless action for a few hours, and who doesn’t like to just turn off their brains for a while and just blow things up? There’s also the factor of hype from previous games building up. Call of Duty 4, Modern Warfare 2, and Modern Warfare 3 were insanely popular, and it’s because of them that the franchise is so well-known.
Rebirth Island was the second map introduced in the game with the integration of Black Ops Cold War's contents. The map was based on the real-life Vozrozhdeniya Island, which was also featured in the Call of Duty: Black Ops campaign mode. Design-wise, the map is a re-imagination of "Alcatraz Island", previously featured in Black Ops 4's Blackout mode. Unlike Verdansk, Rebirth Island is smaller in scale, only allowing 40 players maximum per match. Alongside the release of Season 2 Reloaded for Vanguard in March 2022, Rebirth Island Reinforced, an updated version of the original map, was released, featuring two new points of interest, Stronghold and Docks, and various cosmetic tweaks
https://en.wikipedia.org/wiki/Call_of_Duty:_Warzone#Rebirth_Island