"The Vectrex is an 8-bit video game console that was developed by Western Technologies/Smith Engineering. It was licensed and distributed first by General Consumer Electric (GCE), and then by Milton Bradley Company after their purchase of GCE. It was released in November 1982 at a retail price of $199; as Milton Bradley took over international marketing the price dropped to $150 and then $100 shortly before the video game crash of 1983. The Vectrex exited the market in early 1984.
Unlike other non-portable video game consoles, which connected to televisions and rendered raster graphics, the Vectrex has an integrated vector monitor which displays vector graphics. The monochrome Vectrex uses plastic screen overlays to generate color and various static graphics and decorations. 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 such as Space Wars and Armor Attack."
Source: Wikipedia, "Vectrex", available under the CC-BY-SA License.