As either of the two girls Ice or Aska, you go through 8 Stages with mission objectives involving stealth, puzzle solving and unraveling the mysteries of various important things. Also, Ice and Aska both have the ability to cyber-dive into Cyber-Space in order to complete the various primary mission objectives of each stage involving destroying and acquiring secret and forbidden files that could lead to unlocking another room. Ice is just a US girl who specializes in various firearms and stealth movements while Aska is a Japanese kunoichi who specializes in fast movement and various ninja arts with her deadly katana, shurikens and kunais. Think you'll succeed?