One of the most important manuscripts discovered in recent times is the 4th century Codex Tchacos. It contains 4 texts, two of which (“The Letter of Peter to Philip” and “The [first Apocalypse] of James”) were already known from the finds at Nag Hammadi. The other two present hitherto unknown Gnostic writings (“The Gospel of Judas” and a text which researchers have named “Allogenes”). This publication presents the Coptic texts with a German translation on the facing pages, together with detailed linguistic indexes and observations on the content.