Retrogamer
A retrogamer is a gamer preferring playing and collecting retro games - older video games and arcade games. They may also be called classic gamers or old-school gamers, which are terms that are more prevalent in the United States. The games are played either on the original hardware, on modern hardware via console emulation, or on modern hardware via ports or compilations.
If a gamer likes old video games, he's a retrogamer.
retrogamer
A gamer that plays nothing or (almost nothing) but older video-games, before Playstation or Nintendo 64.
Most retrogamers don't play more modern video-games because most of them now have an obbession with good looking graphics.