Korean authorities want to control under-age access to a list of online games in order to fight related health problems.
The 19 games, which include Dungeon Fighter and Dragon Nest, are all role playing games with persistent worlds which require users to invest hour upon hour of online activity in order to progress.
Korea has been plagued with a spate of deaths after young players collapsed from exhaustion and dehydration after playing for days - or even weeks - at a time.
The night-time curfew will impose a mandatory six-hour black-out on connections to game servers but, as with all of these things, the savvy teens will no doubt find a way of dodging the ban.
Now stop reading this and go to bed. You've got school in he morning.