If you're looking for anime similar to Muv-Luv Alternative: Total Eclipse, you might like these titles. All recommendations are made by Anime-Planet users like you!
Earth is under attack by other-dimensional threats known as Nova, and only the Pandora – girls with special implants that grant them enhanced physical abilities – can battle against them to protect the planet. The military academy Genetics helps train the Pandora, who must choose a younger boy known as a Limiter to assist them in combat. Bridgette L Sattelizer, known to her peers as 'Untouchable', is at the top of her class and lets no one near her – that is, until new student Kazuya Aoi falls into her breasts one day...
Simularities of these series: Sex Appeal (Freezing has nudity where Total Eclipse does not), Both involve humanity fighting against alien race, and both share similair romantic tensions between key characters.
Whle there are key differences from these series (Ecchi, Mecha, etc), if you appreciated how the main characters were developed in one, you may be able to appreciate the other as well as both are done differently.
In the distant future, the human race is on the brink of destruction. Mankind, which now drifts in space aboard a massive, technologically-advanced base known as Avalon, is poised to launch one final, desperate attack against its enemy, the alien race Hideauze. It’s during this battle that Ledo, a mecha pilot, is thrown into a wormhole and sent to an unfamiliar place: Earth, the lost birthplace of humanity said to have turned to ice long ago. Having been saved by the inhabitants of the Gargantia, a fleet of ships that traverses the now-flooded planet, Ledo must come to terms with these primitive people with their backwards language and technology, learn to communicate, and try to find a way back home to his place in the sky.
In the year 2021, mankind was defeated by Gastrea, a parasitical virus, and was forced to live within a wall made of Baranuim monoliths, a metal that is able to subdue Gastrea. Soon, the "Cursed Children" were discovered: children born infected with the Gastrea virus who possess superhuman abilities. Due to the Gastrea virus' intervention, the Cursed Children could only be female. Civil Securities are formed to specialize fighting against Gastrea, operating with the pair of an Initiator, who are cursed children, and a Promoter, serving to lead the cursed children. Ten years after the war, Rentarou Satomi, a high school student and Civil Security member, and his Initator Enju Aihara, receive a secret mission to prevent Tokyo's destruction.
Both of these shows feature a world where humanity is contained and warring against monstrous creatures that threaten their way of life, though Muv-Luv fights with mechs while Black Bullet fights with super-powered, specialized agents. The main male protagonist hangs out with a bunch of female friends and allies and the show tends to focus more on the inner workings of their society and the arising problems as opposed to the bigger global conflict. Both shows hold the same atmosphere and decent accompanying music.