The Cycloid Sentry, also known as the Mini Cycloid Emperor/Cycloid Emperor Sentry is a mini boss version of the Cycloid Emperor. He has the same attacks as his boss counterpart. Two cycloid sentries appear in the Duke Xtreme, expansion pack level, Sanitation Plant. He makes his official debut in the main game in the episode Alien World Order. In some mods like DukePlus he has the same health as the Battlelord Sentry, but he is stronger than them and Overlord Sentry.