Dangerous Dave in Copyright Infringement
Released on December 31, 1990 by id Software 
            
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            Summary
Dangerous Dave in Copyright Infringement is an official modification of Super Mario Bros. 3 of IFD - Ideas from the Deep. The tech demo has the Dangerous Dave instead of Mario to avoid copyright issues. It would lead to the beginning of id Software.The mechanics used here would be later incorporated in the Commander Keen series.
                  Available on: PC DOS
                
              
             
                             
                             
                             
                             
                            