When i beat halo 1 when i was really young. It was the first video game i had EVER played. I was staring at the screen with my big ole eyes and the controller in my hand and SPOILER?- Chief was flying away about to take his helmet off. I was drooling. <-- not really? Lmao!
probably Portal for me. the song made me crack up it was so awesome haha. Medal of Honor was pretty emotional, but one of the better created endings i've seen, also with props for the outro monologue text
Ok I have a few to list. I cried at the ending of Halo: Reach. At the ending of the Saboteur, I had those goosebumps you get when something epic happens. These were the good ones.
My only bad ending was Mafia 2, before the DLC came out. It just ended with no explanation as to what happens.
Worst ever game ending for me would have to be Prince of Persia The Fogotten Sands... Without giving away the ending it was enormously disappointing and abrupt.
My favorite ending would probably be the ending to Castlevania: Lords of Shadow. I thought the tie ins to the 2012 apocalypse hoax were hilarious and it gave a new perspective to the rest of the Castlevania games.
The most memorable for me would have to be Fallout 3. After I sacrificed myself for the good of the wastes and then having the narrator tell all the things I have done was just made me feel proud and sad at the same time.