This OVA is a summary of the first three episodes of Hellsing, with the animation style of Hellsing Ultimate and following the events of the Hellsing manga.

Specials included with the Blu-ray/DVD release of Gabriel DropOut.

In the year 2047, mankind discovered a rare metal ore called "Gaimetal", which possessed a huge amount of energy, and mining for these strange metal ore begins all over the world. However, in 2075, humankind were been constantly attacked by Gaist, a race of metallic creatures whose bodies were encrusted with Gaimetal, thus forming the GCG (also known as "Gaist Crusher Garrison"), an organization tasked with dealing against the Gaist. In 2064, the GCG send out mankind's line of defense: the Gaist Crushers, humans who can wear a special Gaimetal armor called "Gaist Gear", and battle the Gaist,as well as the threat opposed by a mysterious organization called "Erasers".

is an independent short anime made by Mitsuru Sasaki.