Have 5 from class of 81.
Centaur
Fathom
Medusa
Embryon
Elektra
Definitely my favorites. Put all my dishwashing money into them when I was 15 in 1981 along with Berzerk and Asteroids. Will eventually get a EBD and maybe a FG. Only really interested in the original titles so FG might not ever appear in my lineup.