Only 3000 humans remain after three apocalyptic events, referred to as the "Catalysts", severely decreased the population. Catalyst One resulted in the air being toxic to breathe, so everyone wears masks.
After the collapse of the government, various organizations have formed, and fight each other for territory and resources.

Catalyst Wake is a fully illustrated linear visual novel. Instead of the typical "sprites against backgrounds" format, the dialogue is accompanied by illustrations, which gives it a cinematic quality.
The story is a continuation of a series of animations and comics that were released between 2011 and 2016. The novel is split between prequel stories and sequel stories. The sequel stories are fully voiced.

• Full English voice acting for the sequel stories
• Hundreds of illustrations
• Original soundtrack
• Bios
• Behind-the-scenes