Sylphia[a] is a 1993 vertically scrolling shooter video game developed by Compile and published in Japan by Tonkin House for the PC Engine Super CD-ROM².

The game follows Silphia, a maiden warrior reincarnated as a demigoddess under Zeus after her demise in battle, facing against the forces of Hades, who has been possessed and manipulated by the creatures once imprisoned in Tartaros.

[1] Its gameplay is similar to previous shooters by Compile, with the player fighting enemies and bosses, while avoiding collision with their projectiles and other obstacles.

[2] The young maiden warrior is reincarnated as a demigoddess under Zeus after her demise in battle, tasked to destroy the monstrous armies and seek out and put an end to Hades's madness.

[2] She must then try to free the rest of the Greek world from control of the forces of Hades, facing off against mythological figures including giants, a Minotaur, a griffin, and Talos.

[2] Its gameplay is similar to previous shooters by Compile;[5] The player controls Silphia through eight stages over a constantly scrolling background, populated with an assortment of enemy forces and obstacles, and the scenery never stops moving until a boss is reached, which must be fought to progress further.

[6] Kōji "Janus" Teramoto acted as co-graphic artist alongside Aya "Riu" Shimazaki, Hideo Hotta, Neko Koneko, Shōji Mizumoto, Shunsuke Takashima, and Tenji Satō.

[5][6] The soundtrack was scored by Einosuke Nagao, Katsumi Tanaka, Keiji Takeuchi (of Spriggan Mark 2), Satoshi Shimazaki (of Robo Aleste), and Tsuyoshi Matsushima.