The project aims towards finding an answer to whether or not there is a difference between two versions, one with a companion with artificial intelligence and one without a companion, in a self made interactive adventure game, where the test participants have to find a way to get away from an island. The report concerns itself with theoretical work regarding flow theory, GameFlow, and game design. These subjects were used in the creation of the game with which tests were conducted, in order to investigate the aforementioned project aim. Furthermore, the design phases ranging from building, designing, and coding of the game itself will be explained in detail throughout the report. The created game was tested on 42 test participants, and they had to answer two questionnaires, one profiling questionnaire and a flow questionnaire to gather data, so statistical analysis could be made. Tests for normal distribution showed that the data from one group was parametric, while the data from the other group was not. The Mann-Whitney U analysis method was used, and it revealed that there was no significant results.