1. The first video games were text-based games that used characters instead of graphics. They were popular from the 1970s-1990s and some educational games still use the text-based format.
2. "Space War" created in 1962 is considered the first digital computer game. It was programmed by Steve Russell and ran on the DEC PDP-1 computer, featuring two spaceships maneuvering around a star while shooting at each other.
3. Early video game cartridges stored the game data and programs. They were superseded by CD-ROM technology in the mid-1990s as games moved to larger storage capacities of 64 bits.