It's the world's largest computer and video gaming event. There are 193,000 square meters of space in the area according to its website. Many games are shown off here each year in Cologne, Germany.
Not to be confused with the Game.com, if you remember it was a failed and miserable handheld system(I bought into the hype and was bummed out.)
 - http://www.gamescom-cologne.com/gamescom/index-9.php
 - https://en.wikipedia.org/wiki/Game.com