Simple 2000 Series Vol. 101: The Oneechanpon ~The Neechan 2 Tokubetsuhen~ (PS2 Gameplay)
The fourth game in the Onechanbara, is an upgraded version of The Oneechanbara 2. It continues the series's hack and slash style of gameplay in the vein of Capcom's Devil May Cry or Koei's Dynasty Warriors games. This time, Aya is joined by her sister, Saki, and the mysterious Reiko as they must find the cause of a second Zombie outbreak. Retaining the "Cool Combo" system and the Rage and Blood meters found in the first game, The Oneechanbara 2 added some character specific moves, such as Aya's throwing knives, as well as smarter enemies, and new way's to defeat enemies. It also introduced a tag system to the series, allowing the player to select two characters and switch between them at anytime.
Alongside the story mode, the game also featured the arena style survival mode and the quest system. All these features were improved slightly, with all the story levels being different, the survival arena's being unique, and the quest being much more varied.
Hana and Kiku could be unlocked via quests or having save data from Dragon Sisters, with Riho being available from the start and Makoto unlocking after Riho cleared the first stage.