VGA Concentration: V2.1, Alive Software. Build your memory skills and challenge your mind with this colorful card matching game.  It uses the unique capabilities of VGA graphics.  Adlib or Soundblaster music, easy user interface, 3 Levels of difficulty and great graphics. Fun for kids and grown-ups too. This shareware version includes several cards. Requires: VGA or SVGA and 512K memory Options: Mouse, Adlib, SoundBlaster.