Hunter X Hunter: - OVA 3 - Greed Island Final

Source taken from AniDB.net

The story takes place after the second OVA. Gon is still searching for his father inside the game Greed Island.

This OVA will cover Gon, Killua and Biscuit's adventures throughout the game. Will Gon find his father?

Hunter X Hunter: - OVA 2 - Greed Island

Source taken from AniDB.net

The story takes place after the first OVA. After the conflict with the spiders, Gon and Killua return to the York Shin auction to try their luck with Greed Island.

Once inside, Gon and Killua meet up with Biscuit, Wing's old teacher, who helps them train to defeat the monsters and player killers found inside the game.

Hunter X Hunter: - OVA 1 - Original Video Animation

Source taken from AniDB.net

The story takes place after the TV series. After receiving a message from Hisoka, Kurapica finds out that the Spiders are all still alive.

After some discussion, Kurapica alongside with Gon, Killua and Leorio decide to capture a Spider member whose special ability would have the most devastating effect on Kurapica. And so the hunt begins.

Hunter X Hunter

Source taken from AniDB.net/Wikipedia.org

Hunter × Hunter (Hantā Hantā?), pronounced "Hunter Hunter", is a Japanese manga series written and illustrated by Yoshihiro Togashi with an anime adaptation. The first chapter of the Hunter × Hunter manga series was published in March 1998, in Weekly Shōnen Jump.

The story of Hunter X Hunter focuses on a young boy named Gon Freecss, who one day discovers that the father he had always been told was dead was alive and well. He learns that his father, Ging Freecss, is a legendary Hunter. Despite the fact that his father abandoned Gon with his relatives in order to pursue his dreams, Gon becomes determined to follow in his father's footsteps, pass the Hunter Examination, and eventually find his father to prove himself as a Hunter in his own right.