Arma 3
In Arma 3, there are two different kinds of extra content that can be added to the game: "platform content" and "expansion content". Platform content is already included in the game and can be tried before you buy it. Expansion content must be bought and added to the game to be used. There are many different types of platform content, such as Zeus, which lets you control a character that can change the battlefield; Karts, which adds go-karts and racing to the game; Helicopters, which adds new helicopters and missions; Marksmen, which makes sniping gameplay better; Apex, which adds a new island and new things to the game; Jets, which adds new fighter jets and objects; and Laws of War, which adds new things about helping people during a war. There are also expansion content packs like Contact, Tac-Ops, and Tanks, which add new weapons, vehicles, and missions.