One addendum here is that you can use them to measure g, but as soon as you start trying to use them to improve g any value of g you measure using them will be

One addendum here is that you can use them to measure g, but as soon as you start trying to use them to improve g any value of g you measure using them will be incorrect due to learning effects and there is no reliable evidence that playing such games can improve g. Source: wrote my prelims on this.