Deadly Flash

Deadly Flash is a fictional virus from the .hack series. According to forums from the PS2 game, .hack//LIMINALITY, Deadly Flash caused a few people to die when playing games. The virus would emmit a strobe effect light on the monitor affecting the putuitary gland of the person and override it until the person would succomb.

The person who created the virus became the very first person to be sentenced to death over an internet crime.