Recently I just finished playing the visual novel "Clannad" and I think its fair to say it is 10x more intense then both seasons of the anime. Just like the anime the visual novel contains two story arcs. School life and after story, but in order to access the after story, during the game you must collect 8 light orbs. It is basically the same story as the anime, but goes more into detail.
For those completely unfamiliar with this anime here is what the story is about..."Clannad's story revolves around Tomoya Okazaki, a third year high school student who dislikes his life. Tomoya's mother (Atsuko) died when Tomoya was young, leaving his father (Naoyuki) to raise him. After the accident, Tomoya's father turned to alcohol and gambling, and held frequent fights with his son. One day, Naoyuki, again arguing with his son, slammed Tomoya against the wall, dislocating Tomoya's shoulder. Ever since then, his father has treated Tomoya nicely, but distantly, as if Tomoya and he were strangers rather than a family. This hurts Tomoya more than his previous relationship with his father, and the awkwardness of returning home leads Tomoya constantly to stay out all night. Additionally, the injury disables Tomoya from participating in his basketball club, and pushes him to distance himself from his school and other activities. Thus his delinquent life begins. Tomoya's good friend Youhei Sunohara, who got thrown out of the soccer club for a dispute, is also a delinquent and often hangs out in his dorm room with Tomoya doing nothing much.
The story opens on Monday April 14, 2003 at the beginning of the school year,[ when Tomoya meets by chance Nagisa Furukawa, a soft-spoken girl one year older than him who is repeating her last year in high school due to being sick much of the previous year. Her goal is to join the drama club which she was unable to do due to her sickness, but they find that the drama club was disbanded after the few remaining members graduated. Since Tomoya has a lot of time to kill, he starts to help Nagisa in reforming the drama club. During this period, Tomoya meets and hangs out with several other girls who he gets to know well and help with their individual problems"
For those interested in the visual novel(translated2english)
here is the torrent Clannad Visual Novel(english translation)[REMOVED]
Info on updates/patches/other language translations