Rammbock (also Rammbock: Berlin Undead and Siege of the Dead) is a 2010 German horror film directed by Marvin Kren, written by Benjamin Hessler, and starring Michael Fuith, Theo Trebs, Anka Graczyk, and Emily Cox as survivors of a rage virus in Berlin.
Michael, who has recently broken up with Gabi, visits her Berlin apartment to return her keys and hoping to save their relationship.
As Berlin falls into chaos, Michael and the younger repairman, named Harper, barricade themselves in the apartment complex and brace for an attack.
Following news reports, they find out that the rage virus is only activated after the victim undergoes agitation or adrenaline, and it can be subdued by remaining calm or using sedatives.
[6] G. Allen Johnson of the San Francisco Chronicle rated it 4/5 stars and called it "intriguing and skillfully made".
"[8] Gareth Jones of Dread Central rated it 3.5/5 stars and wrote that the story, characters, and performances make up for the lack of gore and derivative setup.
[9] Marc Savlov of the Austin Chronicle rated it 3/5 stars and wrote that "although it adds little to the already overflowing canon of zombie-genre tropes, its brief running time is chock-full o' guts.