Astron Belt was the first there. Piece o' crap that was
Tho I dunno if "laserdisk" could be called a genre...the same goes for 8-bit, 16bit, etc. The information is still stored digitally.
Dragons Lair was more of a graphic adventure or adventure strategy game.
Release dates I've seen don't have months... We may never know! :-)
desiv
Mamefans has Bosconian listed with a release date of 11/1981, Vanguard with a date of 10/1981. So it looks as though the latter was first.
Do the flyers state anything?