user summary: Future/Perfect is a serially published Delta Green scenario by Dennis Detwiller. The scenario parts were written and released under the ransom model.
The scenario was published and released in several PDFs individually and accumulated. There are 4 parts in total, some are available as individual chapters and some are part of a collection of two or three chapters.
The scenario revolves around investigation into mysterious events beginning with a temporal gate under an abandoned factory and ending in a trip to a secret outpost in Earth's distant past