Unlike other video game consoles that connected to TV's to display raster graphics, the Vectrex included its own monitor which displayed vector graphics. It also had screen overlays that would cut down on flickering and also add some color and static images.
At the time many of the most popular arcade games used vector displays, and GCE was looking to set themselves apart from the pack by selling high-quality versions of games like Asteroids, Space Wars, and Armor Attack.
Technical specifications
List of game titles