If you want to play a good visual novel I recommend trying Higurashi no Naku Koro Ni. You can by the official English translated version at
MangaGamer.com. If you are willing to wait you will be able to buy it on
Steam with an improved translation.
Saya no Uta is another great visual novel. It is written by Urobuchi Gen and you can buy it at
JASTUSA.com.