Planescape: Torment/Awesome

• The Mechanus Cannon spell. It shows a brief video sequence of a Wave Motion Gun sized laser cannon firing a continous shot through a portal from the plane of Mechanus to wherever you happened to aim it. And it's utterly devastating in both looks and effects. The makers of Final Fantasy would love it.
• Defeating The Transcendent One by willing yourself out of existance, preventing yourself from ending up in hell.
• Planescape: Torment, especially depending on the path you play as the Nameless One. For example, you can talk the Big Bad into defeat by threatening to commit suicide.
  • Also, if you get the "best" ending, you merge with the Big Bad, who is your own mortality, raise all your deceased friends from the dead, and then go forth to stoically face your final death and judgment in the Hells, teleporting to a battlefield full of demons and picking up a weapon before wading into the fight, hearing the echoes of the game's central question: "What can change the nature of a man?"
    • As an addendum to the above, the fact that, in getting the best ending, you answer the central question. The answer is belief. Belief changes the nature of a man. That a game could answer it's Arc Words at all is stunning, to say the least, considering how rarely such questions get answered, but the way the hero says it- "I have seen belief move cities, change hearts, heal..."- is stunning, to say the least. He talks down a spirit of power incarnate and gets to go to his judgment- and through all this, despite the fact it could be a Downer Ending, it manages to be extremely upbeat. The last thing you see is the Rune of Torment, flapping in the wind, no longer a part of the hero. Death is no punishment for him.
      • That quote deserves to be printed in its entirety: If there is anything I have learned in my travels across the Planes, it is that many things may change the nature of a man. Whether regret, or love, or revenge or fear - whatever you believe can change the nature of a man, can. I’ve seen belief move cities, make men stave off death, and turn an evil hag's heart half-circle. This entire Fortress has been constructed from belief. Belief damned a woman, whose heart clung to the hope that another loved her when he did not. Once, it made a man seek immortality and achieve it. And it has made a posturing spirit think it is something more than a part of me.
  • Fall-From-Grace's line to the Nameless One during the 'best ending': "Time is not your enemy. Forever is."
  • Not to mention the ending where you will yourself out of existence. If that isn't Badass, nothing is.
    • Somewhat related is when one of the Nameless One's incarnations convinces someone that they don't exist. And they immediately cease to do so.
• The Grand Finale has quite a few of these.
  • The Nameless One can potentially win a battle of wills with the Practical Incarnation.
  • The Nameless One learns that he can actually revive anyone he likes from the dead. There's also the possibility that he revives the people he came with to face off against the Big Bad.
  • All of the characters get ones as the Big Bad picks them off one by one... they would rather die than betray the Nameless One and their Nakama. And none of them are even the slightest bit afraid of certain death.
    • I may be bested in battle, but I shall never be defeated.
    • "He means more t' me than my life." "THEN DIE."
• Morte gets one if he successfully uses his Litany of Curses against Ravel. Just to put in perspective: She's an immortal, nigh-omnipotent demon witch from another dimension. He's...a floating skull. And he gets her to throw away every single one of her advantages and engage in fisticuffs... by swearing at her.