19. I Just Want To Set The World on Fire

Although I always strive to be the good guy the first time I played a game, it became a little harder on Fallout 3. The wasteland, after all, was a very harsh place. Doing whatever it took to survive was just part of the package. So of course, when a mysterious gentleman invited me to take place in a dastardly plot to kill lots of people, I jumped at the chance. Then I felt, very, very bad. Watching from the balcony of Tenpenny Tower, I gazed into the distance as the unexploded nuclear bomb in Megaton finally went off, completely vapourising all of the town and its inhabitants who had tried to help me out not so long before. I then took out my sadness on Tenpenny and his chums by shooting them in the face. It made me feel better.
18. Air Goat

If you didn't spend hours on Skyrim marvelling at the effects FUS RO DA'ing everything in sight had, you shouldn't be playing games. I spent absolutely ages FUS RO DA'ing everything from vegetables to the populace of towns, just for the sheer hilarity of seeing everything flung around. A particular highlight for me was always blowing an unsuspecting goat directly off a massive cliff. Not so good for the goat, but pretty damn funny to watch. Here's a thing to try as well - pile as much stuff as possible into an enclosed space by dropping it on the floor, FUS RO DA it, and watch as the game completely breaks as it struggles to keep up. Excellent stuff.
17. Making Italy Awesome

It's always great to see a sequel improve on a premise. Assassin's Creed, a solid game that had interesting concepts, was topped in every single way by Assassin's Creed 2. Of course we're all a bit used to Assassin's Creed now, what with getting one every year, but the first time you clambered atop the rooftops as Ezio, learning the ropes of the Assassin's Creed, was a truly fantastic, highly memorable moment. I still feel it's the best game in the series to date.