When I think of videogames I think of the actual coin operated games. Home videogames are 'consoles'.
1. Galaxians: the first popular color videogame.
2. Pacman
3. Vector games: high resolution compared to the raster games of the time. Asteroids, Battlezone, Star Castle, Tempest, Omega Race, etc.
4. Midway's Tron: how it was linked to the movie release. Lots of movie theaters had it in the lobby when the movie was playing.
5. Dragons Lair: The first step into cartoon type of movie graphics. I personally did not like the game but it was a milestone.