Ok, here's the first opinion.
There have been many games out there, most aren't worth checking out, but some shake the foundations of gaming history.
The game I like the best is something called Super Mario Bros. The Lost Levels.
Basically, it's a harder version of the original Super Mario Bros. that was released in the US by Super Mario All Stars, and Super Mario Bros. Deluxe. In my opinion, this game was extremely hard, but not so hard that you got ticked at the game, which is why it is my favorite game ever.
What's your favorite game?