Zork 18.2% (80)

Zork II 2.7% (12)

Zork III 3.4% (15)

Adventure 11.4% (50)

Treasure of Turing Island 4.1% (18)

Hitchhiker's Guide to the Galaxy 40.1% (176)

Planetfall 2.7% (12)

Starcross 1.4% (6)

Leather Goddesses of Phobos 15.9% (70)