| Infocom Z-Machine code |  Zork - The Undiscovered Underground Ver.16 | 1997 | Activision, Inc. Los Angeles, CA, USA 47875 |
| Infocom Z-Machine code | Abenteuer | 19?? | Arnold, Toni |
| Infocom Z-Machine code |  Zork I - The Great Underground Empire Ver.15 | 1980 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Zork II - The Wizard of Frobozz Ver.7 | 1981 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Deadline Ver.22 | 1982 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Deadline Ver.26 | 1982 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Deadline Ver.27 | 1982 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Starcross - Interlogic Science Fiction Ver.15 | 1982 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Starcross - Interlogic Science Fiction Ver.17 | 1982 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Zork I - The Great Underground Empire Ver.25 | 1982 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Zork I - The Great Underground Empire Ver.26 | 1982 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Zork I - The Great Underground Empire Ver.28 | 1982 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Zork I - The Great Underground Empire Ver.30 | 1982 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Zork II - The Wizard of Frobozz Ver.15 | 1982 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Zork II - The Wizard of Frobozz Ver.19 | 1982 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Zork III - The Dungeon Master Ver.10 | 1982 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Zork III - The Dungeon Master Ver.12 | 1982 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Enchanter Ver.10 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Enchanter Ver.15 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Enchanter Ver.16 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Infidel Ver.22 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Planetfall Ver.20 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Planetfall Ver.26 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Planetfall Ver.29 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Planetfall Ver.37 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Suspended - Interlogic Science Fiction Ver.5 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Suspended - Interlogic Science Fiction Ver.7 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Suspended - Interlogic Science Fiction Ver.8 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | The Witness - An Interlogic Mystery Ver.13 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | The Witness - An Interlogic Mystery Ver.18 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | The Witness - An Interlogic Mystery Ver.20 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | The Witness - An Interlogic Mystery Ver.21 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | The Witness - An Interlogic Mystery Ver.22 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Zork I - The Great Underground Empire Ver.75 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Zork I - The Great Underground Empire Ver.76 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Zork II - The Wizard of Frobozz Ver.22 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Zork II - The Wizard of Frobozz Ver.23 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Zork III - The Dungeon Master Ver.15 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Zork III - The Dungeon Master Ver.16 | 1983 | Infocom, Inc. MA, USA 51051 |
| Infocom Z-Machine code | Cutthroats Ver.23 | 1984 | Infocom, Inc. MA, USA 51051 |
