Gregory's Server
Retro as a label for games is long overdue for either some greater granularity.
Roughly speaking:
Spacewar was 62, Asteroids was 79, Elite was 84, Starlancer was 2000, first release of EVE Online was 2003.
Arguably they're all retro space shooters. Which at that point is just a statement about the label "retro" rather than about the videogames themselves.