* The ending, in which [[spoiler:Big Boss uses his much vaunted CQC techniques to disarm Snake and then ''give him a hug'' before telling how much he respects him as a man, then dies after sharing one last cigar with his son]].
** [[spoiler:In spite of his claims that he never thought of David as a son, Big Boss's love for him as a father is all but confirmed with this:]]
--> "Snake, you are free now... Don't waste it... Start a new life..."
** What makes it all the greater is [[spoiler:Big Boss and Snake's Japanese voice actors are [[Creator/ChikaoOhtsuka father]] and [[AkioOhtsuka son]] in real life.]]
*** What makes it all ''even greater'' is [[spoiler: that the two of them were estranged and distant before the game started development, and Kojima intentionally chose Big Boss's actor to get them to reconcile. ''And they did.'']]
** Made all the more heartbreaking for the fact that David has [[spoiler: has only but SIX MONTHS left by that time.]]
** Seconded. The touching, soft music, the imagery and glowy haziness of all the white flowers in the cemetery, and [[spoiler:Big Boss]]'s "This is good, isn't it?" never fails to make me tear up.
** And a short time before that, [[spoiler:Big Boss]] delivers another heartwarming line while he perfectly sums up the lesson he learned from all the years of war (and at the same time makes clear that the saga finally has reached its end).
-->"[[CallBack Boss... you only need one Snake.]] No... the world would be better off without Snakes."
** Even though [[spoiler:EVA]] may not have believed David's father loved him, she freely admits that she always has.
--> "I'm sorry... your father never wanted you. Human life isn't meant to be [[CloningBlues manipulated like that.]] I knew that, but... ''I'' wanted you."
** Also, when Snake [[spoiler:lights Big Boss' last cigar. Snake performing a gesture of familiarity and friendship to his estranged father (whom he also tried to kill ''twice'') is quite sweet in itself.]]
** There's also Big Boss saluting The Boss' grave, which is also an understated CrowningMomentOfAwesome. He's so weak, even sitting up is hard, but he stands at attention. His arm trembles as he tries to lift it, but as soon as his hand reaches his forehead, he forces himself to stop shaking and deliver a proper salute to the woman who defined his life.
* Sunny forming a microcosm of the ideal of world peace when she says of her new friend "We don't understand each others language but we're having fun."
** Don't forget [[spoiler:Meryl and Johnny's wedding.]]
*** Hey hey now, don't forget [[spoiler:Meryl's rejection, promptly followed with a counter-proposal!]]
** Something apparently overlooked: [[spoiler: after GW goes down and the absence of the system leaves Outer Haven's unmanned defenses dead weight, it also leaves the [=FROG=]s as lumps of weeping, broken women from the onslaught of, until now, suppressed battlefield trauma. The ensuing montage includes a scene of the Missouri's Marines, although keeping their guns trained at all times, rescuing them, with the less debilitated [=FROG=]s in the rafts trying to comfort the ones who have lost the will to even move.]]
*** [[spoiler: The part that really gets to me is one FROG holding another who has collapsed while stroking her head. Seriously one of the sweetest things I have ever seen.]]
** I, for one, got a little bit of this every time Big Mama ([[spoiler:AKA EVA]]) says "[[spoiler:That's my boy!]]". Now if that isn't a touching [[spoiler:mother and son]] moment, nothing is.
** Let's not forget Raiden's segment in the end of the game either. [[spoiler:After suffering all kinds of headbreaking injuries, emotional and physical, Raiden is fitted back with an organic-lookalike body and then reunited with Rose, who is accompanied by a little boy. She reveals that the child is Raiden's son and her apparent marriage to Colonel Campbell was just a cover to protect John from The Patriots. John tells Raiden he's cool like a superhero, and then flourishes his toy sword just like Raiden did in [=MGS2=]. The three of them embrace, Raiden promises Rose he will never abandon her again, and they finally get to be the family they always wanted to be.]] Say what you will about Raiden, but you can't deny that after all the crap he had gone through in his life, he really needed and deserved that happy ending.
* In the celebratory moments after Meryl and Johnny's wedding, Campbell simply looks up to the heavens and says, "Thank you, Snake." The best moment of the game.
** Oddly, I found the scene in the act 5 briefing where Otacon pulls out his lighter and lights Snake's cigarette for him, despite berating him throughout all the games about his smokes, to be extremely sweet.
** Don't forget the final scene that played after the credits rolled. [[spoiler:Otacon promises Snake that he will remain with him as a witness to his life, remembering everything that Snake ever was, and saying that he and Sunny will stick with him until the day Snake dies.]] Makes me choke up every. single. time.
** The most heart-rending line is [[spoiler: "You don't have to come."]] And the most heartwarming is [[spoiler:the fact that Otacon will not hear of it.]] There's just something in my eye... every single time.
* Kind of an odd example for [[@/{{Tanebi}} me]]: I found [[spoiler:Psycho Mantis's]] utter glee when using a controller with Dual Shock 3 technology to be oddly heartwarming. Yes, he killed a lot of people. Yes, he attempted to make [[spoiler: Meryl blow her own brain out...in two different games]]. No, he wasn't sorry about any of it. But he got one last chance to [[spoiler: have a little fun messing with your controller]], and he's so happy about it he practically sounds like a kid in a candy store.
** Doubly adorable since the poor thing ''tried'' to [[spoiler:read your memory card]] like the old days in addition to the above, but failed [[spoiler:thanks to the PS3 not using memory cards]] and sounded so dejected when he couldn't.
* During the [[spoiler:microwave corridor scene]], the camera divides between Snake and all his allies struggling in a LastStand of sorts, only for one divide to show [[spoiler:Sunny's fortune eggs finally come out great for once, foreshadowing that things will be okay in the long run.]]
** On the subject of Sunny, her presence by Snake and Otacon's side is pretty heartwarming when you remember the events of ''Sons of Liberty''. In the end, [[spoiler: Olga giving up just about everything]] wasn't all for nothing, after all.
* After [[spoiler:the destruction of the Patriots AI]], the FROGS, now suffering a mental breakdown due to their nanomachines being shut down, are helped aboard the ''Missouri'' and treated for wounds. One of the FROGS is even seen cradling another and patting her head on a lifeboat.
* From the novelization, which is narrated from the perspective of Otacon, after [[spoiler: Snake]]'s death: "''I have new friends and plenty of little Metal Gears to be my assistants. But [[spoiler: Snake]] isnít with me. The legendary warrior, the man who made the impossible possible, [[spoiler: Solid Snake, is no longer part of this world. I wonít tell you in this book how long he lived after Big Boss set off on his voyage from that cemetery, or what kind of life he had. All Iíll say is that his last days were peaceful. He passed gently, simply falling asleep with a smile on his face. When I thought back to the days and nights heís spent in constant battle, I found great solace in this."'']] Although it's also an extreme TearJerker, it's also extremely heartwarming to know that after a lifetime of war and tragedy that [[spoiler: Snake]] was able to live out his last days peacefully as he had hoped, and with his friend Otacon by his side to the end, just as he promised.