Zork games in order

All 3 games of the Zork series in the order they came out, from Zork I (1977) to Zork III (1982).

1. 
   Zork IPDP-10, PDP-11, TRS-80 +17 · Infocom
   68Jun 1977
2. 
   Zork IITRS-80, Apple II, PDP-11 +13 · Infocom
   47Nov 1981
3. 
   Zork IIICoCo, DOS, Atari 8-bit +12 · Infocom
   64Sep 1982