Hunter X Hunter Ova -

After learning the Spiders are still alive, Kurapika, Gon, Killua, and Leorio coordinate a high-stakes plan to capture the Troupe's leader, Chrollo Lucilfer.

Gon and Killua successfully enter Greed Island , a game created by Gon’s father, Ging, in hopes of finding clues to his whereabouts.

One of the most iconic sequences involves a deadly game of Nen-enhanced dodgeball against the game master, Razor. Hunter X Hunter OVA

Picking up exactly where the TV series ended, the first 8-episode OVA focuses on Kurapika’s final confrontation with the (the Spiders).

After defeating Genthru and completing the game, Gon and Killua use a reward card to fly to a player named "Nigg"—believed to be Ging—but are instead lead to Ging’s apprentice, Kite , setting the stage for the next major arc (the Chimera Ant arc, which was only adapted in the 2011 reboot). After learning the Spiders are still alive, Kurapika,

The story culminates in a tense hostage exchange. Kurapika uses his "Judgment Chain" to seal Chrollo’s Nen powers, effectively crippling the Spiders' leadership at the cost of his own immediate revenge. 2. Greed Island (OVA 2)

You can find more detailed episode guides on Wikipedia or fan summaries on sites like My Anime Shelf . Picking up exactly where the TV series ended,

The duo must face Genthru (the Bomber), a lethal player-killer who is attempting to win the game by murdering other participants.