Heroine Iysayana is a humorous Japanese-style role-playing game. It takes place in the crazy computer game world Byteria. Our title character is Iysayana, the only elf in the small kingdom Ashford. For her, life is nothing but a great party. She really doesn't think about anything else than bashes, boys and booze - until now, when the goddess Yw'nafob forces Iysayana to become a heroine. Now Iysayana has to bear the company of annoying people who actually think they could better the world. Their task is to save Ashford from the ominous Lord Shadmyr and find the lost King Magnus. During their adventures they discover a plot to fundamentally change the face of the world, using some really extreme methods …

Most of the time the game will be played in a 2-D perspective. This is where you walk around and explore the land, talk to people, visit shops, explore dungeons, search for treasures and so on. Whenever the party runs into monsters the game will change to a special turn-based combat screen. If you defeat your foes, your heroes will gain experience and money. At first Iysayana is on her own, but during the adventure other heroes will join your party. The different characters have different abilities, e. g. one may be a healer and another one a warrior, so make best use of them.

When characters have gained enough combat experience they will grow stronger and learn new magic. You can use spells to attack monsters, but also to heal or strengthen your characters. But note that your magic energy is limited and must be refilled from time to time. Talk to the people in the towns to gather more or less useful information. Take a rest in an inn to restore your characters' Santé. There are stores where you can buy and sell weapons and armors. Other items can be used to heal the heroes in mid-combat. The game can be played using the keyboard or a joystick and comes with a detailed help file. You can save and load at any point in the game.