That's right, two enemies from the same game--deal with it! But, seriously, in a game filled with truly immense creatures, special mention has to go to the largest: Colossus XIII, popularly known as “Phalanx.” If I can make a confession: this is my favorite boss fight of all time, for two reasons. First, it’s a completely thrilling action sequence, requiring the player to chase the colossus on horseback before leaping onto its wings and climbing its body. Its unlike anything I've played before or since, and it’s a perfect culmination of everything you've learned in Shadow of the Colossus.
My second reason for loving this boss battle is that it’s just so damn sad. An immense flying serpent, Phalanx circles above an open desert unable or unwilling to attack the player even in self-defense. When Wander is actively stabbing the creature, it will merely burrow into the sands of its desert home before bursting out of the ground to resume circling. When you kill the creature, you have to watch as this oddly beautiful creature crashes to the ground, writhing in pain, and one can’t help but wonder if maybe the quest you set out upon isn't as noble as you first believed.