Computer games become more and more important, as a tool to support education and training at school and university, as well as vocational training in industry. Contrary to the development of business software, the design of a computer game has to follow other development principles, specifically when collecting the end user (potential gamer) requirements. This paper presents two different approaches used to collect end user requirements for the development of computer games to be applied as vocational training tool in the manufacturing industry. These approaches are compared with each other, and analyzed against traditional requirements methods from software engineering. The paper presents the result of the analysis, along with the lessons learnt.