http://www.epilepsy.org.uk/campaigns...ng/video-games
Here's an interesting article detailing the history of the epilepsy problem as it faces game companies.
I'm not sure if this filter was to be implemented by 1C or not. Being a Russian company the regulations may be different. UBI has voluntarily used the testing method for a while and according to the article has edited out the offending effects. I'm also not sure if it was a standing order for all develpoers to employ the epilepsy filter.
Here's the issue at hand and why UBI has decided to go the route they do.
"Most video games carry some warning somewhere on their packaging that refers to epilepsy. These warnings are a voluntary measure by video games manufacturers to try and keep gamers safe. These warnings are all very well – provided you know that you have PSE. Unfortunately – as in the case of Gaye’s son – not everybody does.
Gaye says: “Three quarters of people – 76 per cent – won’t know that they have PSE until something triggers a seizure.”"