I can't think of ten but Chrono Trigger is definitely a work of art in my mind. Every element in that game synthesizes so perfectly. The way the colors of the sprites compliment the music is about the most organic thing I've ever seen in any video game.

Xenogears may qualify, too, although for different reasons. It was epic in length and it's focus on story is unrivaled. I've yet to see another RPG that put as much effort into telling a story. Also, the soundtrack is far and away the best I've heard in a video game.

Portal. I haven't played the second installment (and likely never will as I have no faith in valves ability to make a sequel) but if perfection is something to strive for in art, and I say it is, then portal definitely deserves mention. I can't think of a single flaw in that game. It was a bit short but that is part of what makes it a shining example of perfection in a video game. The saying "Perfection is not achieved when there is nothing left to add but when there is nothing left to take away" applies here. In my mind, you can't add or subtract anything from the original portal without decreasing it's overall quality.

Half-Life and Doom may qualify as well. Both of those games had atmosphere like nobody's business.

I've heard Deus Ex qualifies, but I've not played it yet.

Minecraft - I've already talked about Minecraft in the other thread.