This document details an initial study into cognitive abilities that may be enhanced from playing computer games. Using a neuro-psychological assessment software package titled SynWin, participants were tested for their ability to function in a synthetic work environment. Scores were recorded and after playing computer games for specified lengths of time, the participants were tested again. The computer game employed was Counter Strike. This game is categorised as a first-person shooter (FPS), and is a multiplayer networked game. Differences between this game and other first-person shooters such as Quake III include the realism that Counter Strike achieves and the immersive qualities that surround that player. Different experiments were completed; group one, the control group, where the participants were tested three times without playing computer games between tests and group two where they were only tested twice, but played Counter Strike for two hours before the second test. This group showed a statistically significant improvement in their multitasking abilities. In summary, this study indicates that certain types of computer games can improve cognitive functions, and suggests further research to ascertain if these abilities are retained and what other skills can be enhanced by games similar to Counter Strike.