If you liked the Blue Gender anime, the Anime-Planet community thinks you'd like:
Medusa is a mysterious illness which causes the body to petrify shortly after infection, found throughout the world and steadily increasing the death toll. In order to combat the disease, 160 lottery winners were chosen to be frozen until a cure could be found, one of whom is Kasumi - a twin whose sibling was not one of the chosen. Along with a group of others Kasumi awakens from her cryogenic chamber, but not to the same world she left it: prehistoric monsters roam the now-abandoned castle and eat the survivors, while endless giant thorns rise all around them. Against all odds, Kasumi and the others must now try to survive the horror of their situation and discover the truth behind what's happening, all the while waiting for the Medusa to finally claim their lives...
Both King of Thorn and Blue Gender feature a protagonist that is diagnosed with an incurable disease. They then go into a cyrogenic sleep of somekind, before being woken up to find everything around them is in a state of total chaos.
If you enjoyed the plotline of one, you'll likely enjoy the other. Both are fantastic series.
Mysterious and incurable disease, cyrogenic sleep until cure is found, awaken in a post apocalyptic future (moreso in gender)....fight monsters....fight lots of monsters.
Imo, blue gender was 10x better and made way more sense.
Both of these have similar premises of diseased characters put into cold sleep and being rudely awakened into the middle of a disaster.
It is the year 2124, and the crew of a medical transport ship are carrying dangerous cargo to its destination. The contents, though mostly unknown, are rumored to be viral in nature, and must not be let out under any circumstances. But when a leak occurs, the ship, as well as the crew, is at risk of being destroyed. With only two robotic space suits and limited ammo, can they escape in time, or are their fates sealed?
Over a century ago, mankind was devoured by giant beings of unknown intelligence and origin known as Titans – creatures that eat humans alive indiscriminately and for no apparent reason. The remaining population has managed to survive the last hundred years only by building a multi-walled city capable of keeping the Titans at bay, training military recruits to patrol the perimeter and gather intelligence about their mysterious foe. Eren and Mikasa have lived a relatively peaceful life behind the city's walls, but when a massive Titan appears, smashing the outer barrier and unleashing a wave of terror, their lives are brutally changed forever...
Both shows feature some really well executed struggle for survival against their unknown enemies. In both series, humanity is almost extinct and the general feeling of hopelessness is present in both. Even so, the focus of both shows is on the characters that defend humanity in one way or another. So, because of similar themes and quite similar, yet different setting, I’d say that anyone who enjoyed one could at least check out the other.
Similar themes, both shows are great, not much more to say. All in all I would say blue gender is better as it isnt ongoing and is complete and satisfying as a series.
In the present, Japan is under assault by murderous creatures known as Aragami whose origin and purpose remain unknown. The fate of Japan and the world itself lies with one young woman named Momiji who bears the burden of the Kushinada -- the one who must be sacrificed to silence the Aragami forever. With the help of Mamoru Kusanagi (a human and Aragami hybrid), and an agency filled with firepower-toting bodyguards, Momiji must use her Aragami-sensing powers to help save mankind; but will she ultimately have to lose her own life to save the lives of so many others?
In a post-apocalyptic world overrun with great beasts called Filth Monsters, a glimmering dome protrudes from the wasteland. This is Zuellni, a mobile city unique for having a consciousness in the form of ‘electronic fairies’. Moreover, Zuellni is an academy where the next generation of powerful Heavens-Blade wielders gather to pit their strength against each other in inter-platoon competitions. Nina Antalk, military student and leader of the 17th Platoon, is intent on recruiting only the best; thus, when mysterious Layfon Alseif transfers to the academy, she instantly recognizes his abilities and decides he’s the perfect candidate to join her group. However, with a secret past that won’t leave him alone, and unknown powers beyond the academy taking an interest in Zuellni, Layfon joining the team is only the start of all their troubles.
Chrome Shelled Regios and Blue Gender share next to no similarities, besides the fact that they are essentially soldiers fighting giant mutant insect monsters.
Both include conflict around groups of predominently young people. Both have main male characters overcoming unfortunate pasts in an other-worldly scenario with monster creatures that feed on people. Chrome shelled has a bit nicer animation and has a few similarities to eureka seven as well.