Ranking Every Call Of Duty Campaign From Worst To Best

10. World At War

After the decent-but-forgettable Call of Duty 3, World at War was Treyarch's first real test as a main developer on the series - and boy did they deliver the goods.

Given a full two-year development cycle this time around, World at War put the focus on the Pacific Theatre of World War 2, throwing players into a gritty, brutal portrayal of guerrilla warfare waged by and against the Japanese armies.

In many ways the campaign riffs on familiar sequences from Call of Duty 2, however this time around they're presented in a much more cynical and violent way. Unlike the heroism of that second title, there's nothing really heroic about Treyarch's WW2 tale, and that added hostility and the unflinching depiction of war makes this underrated game in the series still worth picking up today.