More and more games feature color blind modes. I know some of the most played games of the moment have it: League of Legends, Battlefield 4, Call of Duty: Ghosts.
That's good to know, I went ahead to mention color blind out of an assumption though (even though I know even some web sites have them in mind), I haven't read anything about an option for epileptics, I wonder how that would work because making a game safe for epileptics is not only more work but if for some reason someone dies playing your game then you would be to blame, maybe that's because it's not done by big companies?
I think there's something to be said for personal responsibility here. Games are known to have bright flashing lights. If you are epileptic, don't play games unless they are specifically designed to be epilepsy-safe (or have someone nearby to help).