VBGamer

This isn't the same as music.  For music the use of the lyrics is an infringement of copyright.  If you write your own lyrics then everything is OK.  Same for the actual music, if you write your own music then you can't be sued for it.  Just replace the word "lyrics" with the words "source code."  If you write your own code then you've created an original body of work.  This is how Linux was created.  It's a clone of Unix, but the source code for the programs were written by someone else.  It's really a technicality of what's "written" (lyrics, sheet music, source code) as opposed to what it does (a song, a program).