Kensei Online

Kensei Online is the virtual reality massively multiplayer online role-play gaming (VRMMORPG) that players are trapped in. It uses a device which allows the player to become fully immersed in the virtual reality universe. Kensei Online was released on August 20, 2030, with 10,000 players logged in simultaneously. However, the absence of a log-out button caused great concern.

The Game Master explained that it was impossible to exit the game because the removal of the log-out button was an intentional design decision and that the virtual reality device that enables the player to enter the virtual world prevents the player from returning to the real world and will kill the user if he dies in the game world.

Behind the scenes
The premise of a video game becoming a game of death is heavily based off of Sword Art Online.