Eva talking about The Boss at the end of MGS:Snake Eater. At that point I realised a true video game hero.

"Talos the mighty! Talos the unerring! Talos the unassailable! To you we give praise! We are but maggots, writhing in the filth of our own corruption! While you have ascended from the dung of mortality, and now walk among the stars! But you were once man! Aye! And as man, you said, 'Let me show you the power of Talos Stormcrown, born of the North, where my breath is long winter.' 'I breathe now, in royalty, and reshape this land which is mine. I do this for you, Red Legions, for I love you. Aye, love. Love! Even as man, great Talos cherished us. For he saw in us, in each of us, the future of Skyrim! The future of Tamriel! And there it is, friends! The ugly truth! We are the children of man! Talos is the true god of man! Ascended from flesh, to rule the realm of spirit! The very idea is inconceivable to our Elven overlords! Sharing the heavens with us? With man? Ha! They can barely tolerate our presence on earth! Today, they take away your faith. But what of tomorrow? What then? Do the elves take your homes? Your businesses? Your children? Your very lives? And what does the Empire do? Nothing! Nay, worse than nothing! The Imperial machine enforces the will of the Thalmor! Against its own people! So rise up! Rise up, children of the Empire! Rise up, Stormcloaks! Embrace the word of mighty Talos, he who is both man and Divine! For we are the children of man! And we shall inherit the heavens and earth! And we, not the Elves or their toadies, will rule Skyrim! Forever!" 

[url=http://m.youtube.com/watch?v=W-smcZS_nkA]This[/url]

"You speak of knowledge, Judicator? You speak of experience? I have journeyed through the darkness between the most distant stars. I have beheld the births of negative-suns and borne witness to the entropy of entire realities... Unto my experience, Aldaris, all that you've built here on Aiur is but a fleeting dream. A dream from which your precious Conclave shall awaken, finding themselves drowned in a greater nightmare." - Zeratul, Starcraft I

Vass's insanity speech from far cry 3

I cant decide between these so you can decide yourself [spoiler]In the Age of Ancients, The world was unformed, shrouded by fog A land of grey crags, archtrees, and everlasting dragons But then there was Fire And with Fire came Disparity. Heat and cold, life and death, and of course.. Light and Dark. Then, from the Dark, They came And found the Souls of Lords within the flame. Nito, the first of the dead The Witch of Izalith, and her daughters of chaos Gwyn, the Lord of Sunlight, and his faithful knights And the furtive pygmy, so easily forgotten With the Strength of Lords, they challenged the dragons. Gwyn's mighty bolts peeled apart their stone scales The witches weaved great firestorms Nito unleashed a miasma of death and disease And Seath the Scaleless betrayed his own, and the dragons were no more Thus began the Age of Fire But soon, the flames will fade, and only Dark will remain Even now, there are only embers, and man sees not light, but only endless nights And amongst the living are seen, carriers of the accursed Darksign.[/spoiler] [spoiler] I suspect thou hast taken a gander at it, But the Dark of the Abyss, which swallowed poor Artorias, threatens to devour our entire land of Oolacile. It seems that this dire fate is unavoidable. But, seduced by a Dark serpent or no, They awoke that thing themselves, and drove it mad. …One's demise is always one's own making. [/spoiler] [spoiler] This pleases me greatly! Well then, take this. We are amidst strange beings, in a strange land. The flow of time itself is convoluted, with heroes centuries old phasing in and out. The very fabric wavers, and relations shift and obscure. There's no telling how much longer your world and mine will remain in contact. But, use this, to summon one another as spirits, cross the gaps between the worlds, and engage in jolly co-operation! Of course, we are not the only one engaged in this. But I am a warrior of the sun! Spot my summon signature easily by its brilliant aura. If you miss it, you must be blind! Hah hah hah! [/spoiler]

Armstrong's speech in the last level of Metal Gear Rising.

Why has no one said Sgt. Johnson's speech in the beginning of Halo: CE? The Legendary version was kick ass.