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Message: <blockquote data-quote="Achan hiArusa" data-source="post: 4672641" data-attributes="member: 2597"><p>Most D&D games are Progress Level 2.  I would probably make any would be "Inventor" take Knowledge (technology) and Profession (inventor).  Then somewhat like GURPs I would require about 10 Knowledge (technology) checks to think of the new "invention" and 10 Profession (inventor) checks to produce a prototype.  The DC would be 20 times the increase in Progress level (so 20 for PL 3, 40 for PL 4, etc), two successive failures ruins the project.  The prototype will be faulty and will probably have a critical failure rate of 1-3 on a d20 when making skill checks and attack rolls with it.  After that I would repeat the process to reduce the failure check by one point, but the user would have to make at least 2 or 3 critical failures under field conditions with it before those checks could be made .  And some inventions (like a gun) would be multiple inventions (powder, bullet, and gun).</p></blockquote><p></p>