| Title | System | Year | |
|---|---|---|---|
| Archive.org | Zork I: The Great Underground Empire | Atari 400/800 | 1982 |
| The Good Old Days | Zork I: The Great Underground Empire | PC | 1981 |
| The Good Old Days | Zork I: The Great Underground Empire | PC | 1981 |
| Archive.org | Zork I The Great Underground Empire | Amstrad CPC | 1984 |
| The Good Old Days | Zork I: The Great Underground Empire | PC | 1981 |
| Archive.org | Zork I - The Great Underground Empire | Apple II | 1980 |
| Archive.org | Zork I - The Great Underground Empire | Apple II | 1980 |
| The Good Old Days | Zork I: The Great Underground Empire | PC | 1981 |
| RetroGames.cz | Zork: The Great Underground Empire | PC | 1980 |
| Archive.org | Zork I: The Great Underground Empire | C64 | 1983 |
| Archive.org | Zork I - The Great Underground Empire | Apple II | 1980 |
| Archive.org | Zork I - The Great Underground Empire | Apple II | 1980 |
| The Good Old Days | Zork I: The Great Underground Empire | PC | 1981 |
| The Good Old Days | Zork I: The Great Underground Empire | PC | 1981 |
| The Commodore Zone | Zork I - The Great Underground Empire | C64 | 1983 |
| DJ Old Games | Zork I: The Great Underground Empire | unknown | 1980 |
| The Good Old Days | Zork I: The Great Underground Empire | PC | 1981 |
| Archive.org | Zork I: The Great Underground Empire | Atari 400/800 | 1983 |
| Macintosh Garden | Zork Trilogy | Macintosh | 1984 |
| The Good Old Days | Zork I: The Great Underground Empire | PC | 1981 |
| Games Nostalgia | Zork: The Great Underground Empire | PC | 1982 |
| Archive.org | Zork I: The Great Underground Empire | Atari 400/800 | 1982 |
| Archive.org | Zork I: The Great Underground Empire | C64 | 1983 |
| Archive.org | Zork I - The Great Underground Empire | Apple II | 1980 |
| XTC Abandonware | Zork - The Great Underground Empire | PC | 1982 |
| The Commodore Zone | Zork I - The Great Underground Empire (Solid Gold Edition) | C64 | 1987 |
| Abandonware Dos | Zork I: The Great Underground Empire | PC | 1982 |