Constituting the thoroughly refereed post-conference proceedings of the twelfth Advances in Computer Games conference held in Spain in 2009, the 20 revised full papers cover topics from Bayesian modeling to incongruity theory and data assurance.

Describes the top secret missions and projects of both sides during World War II and discusses the impact of these projects on the outcome of the war and their effect on the course of history.

Discusses the notable events of World War II that took place in Europe, from the ominous chain of events leading up to Germany's invasion of Poland to the death of Hitler.

Three friends form a codebreaking service and meet a motley cast of characters including a Bulgarian spy, a man from the State Department, and a little old lady who wants her diary encoded.