After nearly 100 years of war between the nations Gilgamesh and Balarant, battle-weary soldier Chirico Cuvie finds his world utterly shattered when what seems to be a straightforward mission to infiltrate an enemy base turns out to be an attack on friendly forces. Furthermore, in the confusion that ensues, he stumbles upon a strange container with a beautiful woman sleeping inside. Unfortunately for him, he hasn’t just discovered any woman, but the key to a dark and complex political plot, and the perpetrators are determined not to let him live with their secret. Haunted by the memories of this mysterious woman and the betrayal of his superiors, Chirico must now fight to discover the twisted truths lurking behind the veil of war and gain new meaning to his bitter life.
Mozaicka is so incredibly obscure that I can't really think of specifics for this recommendation, but chances are if you enjoy Ryosuke Takahashi's early directed works like Votoms, Layzner, Dougram, etc, chances are you'll get some enjoyment out of Mozaicka since his usual style is definitely there.
The year is Universal Century 0087, and mankind has yet to be liberated from Earth's gravity. Seven years since the end of the One Year War, tensions between the Earth Federation and the space colonies continue on the rise. The police actions of the Titans, the Federation's military arm in space, fuel anti-Earth sentiment throughout the colonies and give rise to the Anti-Earth Union Group. Kamille Bidan, a young spacenoid from Space Colony Noa, soon finds himself in the middle of this armed conflict and behind the cockpit of the Titans newest weapon: the Gundam Mk-II.
Classic 80's Sunrise mecha shows. While the storyline and characters aren't really comparable between the two, the shows do give off a similar kind of vibe and atmosphere. Zeta Gundam is often noted as being one of the darkest Gundam series out there with a very serious tone and so forth, and Votoms itself is very gritty, realistic, and all around consistently mature. Votoms has a trio of goofy and likeable characters for some comedic elements but at the same time, the show sometimes feels even darker than Zeta. Both tend to get a little supernatural by the end and it works really well. Chances are if you like one of these shows, you'll be able to appreciate and enjoy the other a lot too.
"Labors" are large construction robots that are now being used to commit crimes. To meet the challenge, Special Vehicle (SV) units are established by the Tokyo PD. However, the Second SV unit is a total joke. Determined to change this, Izumi and Shinohara become pilots of the new Ingram 98 police labors, and are determined to change that reputation, with the help of the SV-2 gang of misfits.
Both defining the meaning of realistic mechs. Patlabor and votoms may have somewhat of a different story but if you want a realistic mech 1 of these 2 are right for you. Instead of having unstoppable robots(gundams) you can reasonable mechs like the Ingram or Scope dog.
Mecha shows? More like hard/sci-fi. Fang of the Sun Dagram marks the directorial debut for Ryosuke Takahashi [edit: under Sunrise], widely known for his successful Votoms franchise. Votoms and Dougram (along with Layzner and potentially Galient) are probably the most serious, grittiest, mature, 80's mecha series out there. While Dougram is far more political, dialogue heavy, and loaded with a bigger cast, whereas Votoms focuses more on Chirico's journey - both shows put a heavy emphasis on detail, whether it be plot or action related with the gritty mech's, and they're just generally mature and -manly- shows all around. These are shows that even non-mecha fans could probably get into if they're into militaristic/war sci-fi.