Shadow of the Colossus: Wander defeats the first colossus. Realizing that his quest to revive his love is indeed possible, he swiftly makes his way to the second colossus.
Through his sword, he discovers the second colossus has weak points under its hooves. He just needed to shoot at them with his bow and arrow in order to create a path for him to climb.
He stands in front of the colossus, it stares down at him, then it lefts its front legs up into the air in an attempt to stomp on our hero. Wander carefully aims his bow, his heart racing as he stares at the underside of the creature's hoof. He takes a deep breath and fires.
He misses. Before he could get another arrow out, the world suddenly turns black.
Days pass, without Wander being able to kill the colossi, Dormin could not hold his end of their bargain. And so, Mono's body is left to rot and decompose.
Lord Amon and his followers eventually make it to the Shrine of Worship, but they find only one of the statues broken and Mono's rotting body on the altar. They could only assume Wander failed in his quest, and lament over someone so young doing something so foolish, yet well-meaning. They proceeded to scour the Forbidden Lands and eventually found and recovered the Ancient Sword. They pray to Wander's corpse before they made their way back home. At that point, they would take special measures to make sure a tragedy like this would never happen again.
ICO: As the bridge separated and began to pull the two apart, Ico watched as Yorda went farther and farther away from her. By the time he realized he could have jumped to her, it was too late. The gap between them was far too large for him to jump. He could see Yorda calling to him. She was clearly horrified over what was going to happen to them both.
Ico turned around and saw the line of idols blocking his way to freedom. If Yorda was with him, they could have moved them out of the way and they could have escaped.
But he was alone now. He couldn't get past the idols on his own, and the bridge he was on was slowly disappearing into the cliff walls. Below him was nothing but ocean and sharp rocks.
He suddenly realized that this was it. He was going to die. There was nothing he could do. All he could think about was Yorda, and what her mother was going to do to her. Despite only knowing her for a short time, and despite the fact he couldn't understand her language, he grew to really care about her and saw her as his absolute best friend. And yet he failed to save her. Perhaps if he could have reacted faster, he would have jumped the bridge and protected her from whatever would come after them, like he did numerous times when they were together. But he didn't.
Eventually, the bridge was gone, and he fell. His fate was sealed.
Yorda's mother would perform her evil ritual and take over her daughter's body so she could continue living on. Yorda would no longer be herself.