Commander Keen - Copyright Protection


The early 90s were a fun time for software and games, and they often employed creative ways to prevent piracy. Apogee's Commander Keen 6 came with a manual containing creature names, and after you run the program, you are prompted to look up the creature name. DRM from 1991 :) Who still has their manual? I presume you can obtain one at one of the abandonware sites...
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nerdymark
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