If you liked the Genocyber anime, the Anime-Planet community thinks you'd like:
Since the activation of the Death Force program, mankind has virtually been wiped off the face of Jerra by brutal, flesh-eating war machines. A pocket of survivors live inside an island fortress led by Krauser, a MD (Most Dangerous) soldier. However, unlike MD Geist who lives only to fight, Krauser is motivated by his own ambitions for fame and power. The final battle between Krauser and Geist approaches, and with endless machines on their trail, there appears to be little hope left for humanity.
Both of these animes are about the ultimate killing machines. MD Geist is set in a post-apocalytic world whereas Genocyber only features this in the last two episodes. Both however feature lots and lots (and lots) of graphic violence and both of these feature an antagonistic character who has an inflated ego whilst ruling a city of survivors. The similarities are quite striking so if ultra-violence rocks your boat then these are animes to check out.
These are two anime that revel in their violent themes without putting much thought into the plot. Both anime send the blood and guts flying by the bucketful.
Genocyber has a convoluted and frankly dumb plot, but Geist has little to no plot. So if you're looking for some older style anime high on action then check out either of these shows.
Cheesy, hyper violent 90's OVA's are generally pretty alike, and these two are no different. Each goes full throttle with the violence at the expense of a plot that makes any sense, or even at the expense of a plot at all in the case of Geist.
If you love your cheese and violence, then you should get a kick out of each, but if you're looking for more depth you will leave disappointed.
For Kouta and Yuka, finding the bloody naked young girl on the beach would change their lives forever, for better or for worse. Unable to speak or function as a normal human being, she is named Nyu by the duo, and taken into their home in an effort to save her. But what neither teenager knows is that this innocent young girl is actually a killing machine -- an experiment gone terribly wrong -- and it is only a matter of time before the murderer in her awakens again...
If you thought evil laboratories creating killer girls in Elfen Lied made a good story for death, destruction and gore, check out Genocyber (and vice versa of course).
Both anime deal with girls with "special abilities" (to maim and murder mainly), tested upon in laboratories and driven to the brink of insanity. The stories in that sense are very much the same. In both cases you can also wonder who the real monsters are: the monsters or those whom created them.
In terms of gore and horror effects Genocyber probably surpasses Elfen Lied. Elfen Lied however is a lot newer and as such is better animated overall.
Considering these 2 anime are exactly 10 years appart the only thing that has changed is the animation. Both have lots of violence and a loner girl who has crazy powers in which she kills without hesitation. If you loved Elfen Lied check out it's older sister Genocyber and vice versa because they are carbon copies of each other.
Ikurou is a young man with problems: after a terrible car accident, he was captured by a seedy organization and implanted with a parasite known as Baoh -- a creature which bestows superhuman powers on its host, especially when mortally wounded. While being transported by train, he is accidentally set free by Sumire, young a psychic girl, and the two make their escape. With more of his humanity slipping away by the minute, and the organization hot on their tracks, will the two escape with their lives, or simply cause a bloodbath along the way?
Both of these animes are old school late 1980s/early 1990s violent sci-fis. They both focus on a being with superpowers and involve gruesome deaths. If you like one, then check out the other
Even though Genocyber is much older, whilst watching Blue Gender: The Warrior I felt that they have a few similarities. Both involve monsters in a post-apocalytic world and there is plenty of gory violence. If you like that sort of thing try these animes out.