I bought my little brother one of the GTA's because he begged me about 10 years ago...
I knew the title but nothing of the game. It's anti-social filth that glorifies some pretty abhorrent stuff. I was horrified.
Then he came to live with me a few years later and I'd sneak in an hour or two when he wasn't home. By the end I was calling in sick to play it with him.
We'd mostly just try and steal the tank and drive around the city crashing into things, killing people and beating up hookers for their trick money.
The greatest achievement was when we got two hookers in the same car. You weren't supposed to be able to do that....
(see?)