Dagonet (King Arthur), breaks the ice-covered lake below him in a battle with an axe in a suicide attack, sacrificing himself so that Arthur and the rest of his party can escape to safety.
Nathan Dawkins (Beyond: Two Souls), commits suicide via self-inflicted gunshot wound to the head as a final act of reparation for the myriad of execrable misdeeds he committed during his own personal earthly existence, and to reunite with his deceased wife and daughter.