Cyclops (Greek: Κύκλωψ) is a play by Euripides, probably first produced around 412 BC. It is the only fuly surviving example of a satyr drama, the plays which traditionally provided a comic coda to the tragic trilogies submitted in dramatic competitions at Athenian festivals. Its subject matter is taken from the encounter with Polyphemus in the Odyssey.
Free online texts
Gutenberg: Κύκλωψ, Greek text. Multiple formats.
Internet Archive: The Cyclops, English verse translation by Percy Bysshe Shelley. Multiple formats.
Internet Classics Archive: The Cyclops, translated by E.P Coleridge. HTML and TXT formats.
Poetry in Translation: Cyclops, translated by George Theodoridis. Multiple formats.
University of Adelaide: The Cyclops, translated by E.P. Coleridge. Multiple formats.
Gutenberg: Euripides and His Age, by Gilbert Murray.
History of Ancient Greece: Early Euripides, podcast by Ryan Stitt.
Wikipedia: Cyclops (play).
The Great Conversation: Further reading at Tom's Learning Notes
Homer: The Odyssey.
A.E. Haigh: The Tragic Drama of the Greeks (1896).
Ancient Greek resources: Learn to read Greek classics in the original.
Bloom's Western Canon: Cyclops is listed.