Valis

Her friend Reiko went out on a date with a Dark King named Rogles, and has vanished.

Immediately, monsters attacked her.

She thought she would die for sure, but a mystic sword named Valis appeared before her.

Using the sword, Yuko defended herself against the monsters, and was whisked to a strange land, where she was told that she was the chosen Valis Warrior and must defeat Rogles, or the human world and the dream world would both be plunged into chaos.

Valis: The Fantasm Soldier is a side-scrolling platformer.

Yuko can jump and attack enemies with her Valis sword, which can be upgraded and used as a ranged weapon by collecting power-ups found in the stages.

She can also find and use items that grant her powerful all-screen attacks or temporary invincibility.

Each stage culminates with a boss battle, after which Yuko's hit points and attributes increase.

Valis for Sega Genesis is currently worth €95.59 loose, €98.43 complete in box, and €506.02 factory sealed. Prices are based on real sales and update regularly on Gamevaro.

Valis has a steady sales history on the tracked marketplaces, meaning it trades hands regularly and isn't considered particularly rare.

Loose means cartridge or disc only, CIB (complete in box) includes the original box and manual, and sealed means factory-sealed and never opened. For Valis, loose is €95.59 and CIB is €98.43 — CIB commands a premium because original boxes and manuals are fragile and often don't survive.