In the Xbox 360 title, Metro 2033, besides all the shooting you'll be involved in, there is a chance for you to show some kindness.
In this achievemnet tutorial, you'll find out how to unlock the Generous achievement. In order to get the 10 gamerscore with this, you'll have to help the poor, give a coin for the kid, medicine for the sick, and you help everyone you see. It's really easy to do and won't cost you much. So go out and be good. Enjoy!