This is the trailer that explains the basic concept of Darkworlds.

Darkworlds is a science fiction LitRPG novel: think The Matrix or Neuromancer, where entities are self-replicating in trillions of line of game computer code and becoming sentient.

First they want to colonise the game, then they want to colonise your mind.

The only way to fight them is to enter the Virtual Reality Massive Multiplayer Online Role Playing Game and take on the creeping evil in London in 1927