Demonomicon

The definitive guide to demons who have entered our world from the Abyssal Void.

You can use the search/filters to sort by power level, aspect, name, etc.

Power level key
Sub-Creeper: weakest, can be dispatched by a single human
Creeper: can be usually killed by a skilled single human
Nightmare: usually takes a coordinated attack by multiple skilled/lucky humans
Terror: usually requires armed forces response
Catastrophe: will probably destroy multiple cities before being stopped
God: unseen, likely continent-destroying power