End in death of protagonist 5. Tragedies often have two feuding parties 6. Often have brother vs. brother, or son against uncle, or trusted friends against each other, etc. I can't think of many more. Northrop Frye writes many criticisms on Shakespearean tragedy that may give a more detailed answer.
Plays usually begin in festivities or happiness, and end in tragedy.
Tragedies focus an an individual i.e. Hamlet, Othello, Richard III etc. Northrop Frye writes many criticisms on Shakespearean tragedy that may give a more detailed answer.