Ordyne is a horizontal side-scrolling shoot 'em up (also considered a "cute 'em up" due to its lighter tone) that puts players in the role of Yûichirô Tomari, a genius scientist, and Sunday Chin, his faithful assistant. The two heroes must rescue Tomari's fiancee Kana Aibara from the evil Dr. Kubota.
During gameplay, players can obtain crystals that can be used to buy special weapons, extra lives, and other power-ups at shops located throughout the levels. There are also bonus games that allow players to win multiple crystals or points by shooting at rotating targets. Ordyne is two-player simultaneous.