I Married A Monster From Outer Space
A classic, in a sense. The box promises that "The bride wore TERROR!" but all of the monstering takes place after weddings. There's some oddly snappy dialogue and occasionally good special effects, but it's pretty much just a marital-themed Invasion of the Body Snatchers. It would make for a killer musical.
Beyond Good and Evil
One of the more overlooked games of the past few years. I haven't gotten very far, but it's an action-adventure game done up in a nice Disney-cartoonish style that involves an evil conspiracy on an alien planet. The main character is a reporter. You take pictures. You fight. Pretty basic gameplay, but the original design keeps it engaging.
Grand Theft Auto: San Andreas
I once got lost looking for my house. I drove around a lot. I earned a couple skill points in driving and biking. I fell in the water and saw the pretty jellyfish and sea turtles. I listened to country music. I watched the stars come out over Red County. I eventually realized that my house is marked on the mini-map with a giant "S" that is directly opposite the giant "N" that marks the compass. Then I beat up a couple of crack dealers.
Yeah, this is a pretty open-ended game.