Ketsui: Kizuna Jigoku Tachi (ケツイ ～絆地獄たち～) is a vertical shoot ’em up arcade game by Cave. It was released in Japanese arcades in 2003. A Nintendo DS boss rush version was released on October 23, 2008 in Japan. It included a Superplay DVD featuring a world record scoring run by a top ranked player. The arcade game was ported to the Xbox 360 and released in 2010. A special version of Dodonpachi Daifukkatsu Black Label was released on the Xbox 360 in 2011, which is a crossover with Ketsui, featuring the ship, re-arranged music and scoring system from Ketsui on top of the Dodonpachi Daifukkatsu Black Label scoring system. The game adds the ability to save replays, which can be sent to other Nintendo DS units. In addition, it can upload the Ketsui demo game to other game consoles via Download Play. The EVAC Report feature allows players to unlock up to 113 panels covering the 11 bosses’ artworks when specific conditions are met, some as simple as changing the sound options or touching all four corners of the screen with the ship, others as complex as defeating a boss in under 15 seconds or clearing Extra Mode. At times, failure to unlock a panel within a certain deadline might partially unlock it, revealing a grayed portion of the picture and what is required to unlock that portion; clearing modes, uncovering entire pictures and/or unlocking certain panels enables questions and replays in the Tell me! IKD-san! extra featurette.
