Final Fantasy X
FFX started many things for me. Actually, it started everything. Final Fantasy X was the first RPG game and first Final Fantasy game I played. It was the first, and one of the few, games that drew legitimate emotion from me: happiness, jealousy, anger, sadness. It is one of the only games to make me cry, and the only one that made me do so multiple times. It's gripping, original, and emotional plot and driving narrative inspired me to begin writing, something which I have been doing ever since. The musical score inspired me to learn piano and take interest in multiple types of music. I have now been playing piano for years, the first song I ever learned being the game's "To Zanarkand". The game ignited a fire within me that still has not gone out or died down.
The gameplay and sphere grid are among my favorites in RPGs, which I now have played plenty of. The game feels like an enormous adventure, taking you from the high tech home of Zanarkand to the frosty mountains of Mt. Gagazette. The whole idea behind the game and the world created inspired me greatly, sparking originality in me and the drive to create a new, compelling world each time I write.
Even telling you all this, I cannot fully describe how vital this game has been in my life. The smallest spark can cause a fire, and this rings true here. Some people's inspirations are books, movies, poems, people...when I get big, and it will come, I'm gunna be the guy pointing at Square's FFX. Too me, this game is as close to perfection as it comes.
Metal Gear Solid 4
The MGS series as a whole is probably my favorite of all time (not FF because they have different stories). It's pure intellectual value show that games and progress beyond merely aim and shoot. Hideo Kojima takes reality and makes it his own. The reason I chose the final installment was because, not only did it wrap up the complex series with perfection but it did what only the game before it did: bring an emotional response to me. The entire game is cinematic and epic.