Allogenes is a Sethian Gnostic

Gnosticism

Gnosticism is a scholarly term for a set of religious beliefs and spiritual practices common to early Christianity, Hellenistic Judaism, Greco-Roman mystery religions, Zoroastrianism , and Neoplatonism.A common characteristic of some of these groups was the teaching that the realisation of Gnosis...

 text from the New Testament apocrypha

New Testament apocrypha

The New Testament apocrypha are a number of writings by early Christians that claim to be accounts of Jesus and his teachings, the nature of God, or the teachings of his apostles and of their lives. These writings often have links with books regarded as "canonical"...

. The main surviving copies come from the Nag Hammadi library

Nag Hammadi library

The Nag Hammadi library is a collection of early Christian Gnostic texts discovered near the Upper Egyptian town of Nag Hammadi in 1945. That year, twelve leather-bound papyrus codices buried in a sealed jar were found by a local peasant named Mohammed Ali Samman...

, though there are many missing lines. A small fragment also survives in the more recently discovered Codex Tchacos

Codex Tchacos

The Codex Tchacos is an ancient Egyptian Coptic papyrus containing early Christian Gnostic texts from approximately 300 AD:*The Gospel of Judas*The First Apocalypse of James*The Letter of Peter to Philip...

, which may help in filling the gaps.

The text concerns revelations to Allogenes. Allogenes proceeds to describe how he overcame fear and ignorance, and ascended to the esoteric realm of the God of the Gnostics.