Computer games potentially offer a useful research tool for psychology but there has been little use made of them in assessing cognitive abilities. Two studies assessing the viability of a computer game-like test of cognitive processing speed are described. In Experiment 1, a computerized coding task that uses a mouse response method (McPherson & Burns, 2005) was the basis for a simple computer game-like test. In Experiment 2, dynamic game-like elements were added. Validity was assessed within a factor analytic framework using standardized abilities tests as marker tests. We conclude that computer game-like tests of processing speed may provide an alternative or supplementary tool for research and assessment. There is clearly potential to develop game-like tests for other cognitive abilities.