Will playing too many video games cause my son to have epilepsy?

No. Video games do not cause epilepsy, however they may unmask a pre-exisitng seizure disorder. The different lights and sounds may trigger seizures in some susceptible children. Make sure your child has less than 2 hrs of screen (iphone, video, computer) time a day.
No. Technically epilepsy is a seizure disorder without a clearly definable cause. Certain people with a seizure disorder may be susceptible to more seizures when exposed to the visual and perhaps the auditory stimulation of certain video games, played on certain kinds of screens or monitors. The number of games, as in enough or too many, is not the issue.