Thomas Crook submitted work for assessment in his Extended Diploma in Creative Media Production – Games Design program. The submission was for Unit 70 Game Engines and included evidence for three tasks related to the purposes of game engines, using a 2D engine, and using a 3D engine. Each piece of evidence was a blog post on TomCrookUnit70.blogspot.co.uk with the appropriate page numbers or descriptions listed. Thomas signed a declaration that the work was his own.