After completing the main storyline of dot hack gu 3, you receive an email indicating that the Forrest Of Pain event is now available. I basically played through the entire forest of pain event in this series of videos, recording my progression. For those of you that want to see the conclusion or skip ahead I have provided linked in the descriptions of all three videos. This entire endeavor took me roughly 14 hours of gameplay.
Block 1 to Block 15
Block 16 to Block 30
Block 31 to Block 45
Block 46 to Block 60
Block 61 to Block 75
Block 76 to Block 85
Block 86 to Block 100