Aldnoah.Zero is a mecha-anime airing in July 2014, with season one ending at September 2014 at 12 episodes and the second season starting at January 2015 and finished with 12 more episodes.
During the Apollo 17 mission, mankind discovers ancient technology which allows man to travel in space. With this discovery, man began to migrate to Mars as a settlement. However, with the discovery of more powerful ancient technology on Mars, the men settling on Mars seceded themselves from Earth and proclaimed themselves as the Ver Empire, keeping all the Martian technology to themselves. After a declaration of war by the Ver Empire against Earth ends with the alien technology discovered on the Moon destroyed, along with most of the Moon in the process, a cease-fire was declared. In 2014, Princess Asseylum Vers Allusia from the Ver Empire is sent to Earth in a peace mission. However after an assassination attempt was carried out and Asseylum believed to be dead, the 37 Martian Vers Orbital Knights of the Ver Empire launch a full-out attack on Earth in retaliation. The story revolves around a boy named Inaho Kaizuka, who with his classmates, must survive the Martian assault waves by using Kataphrakts, military mechas designed to combat this scenario. But with the humans already outgunned and decimated by the Martian's advanced and nigh-invincible Kataphrakts, Inaho and mankind's chances in this war is slim.
The following weapons were used in the anime series Aldnoah.Zero:
The standard sidearm for the United Forces of Earth throughout the show seems to be the Glock 17.
SIG-Sauer P220
Lt. Marito has a SIG-Sauer P220 as his sidearm during the War against the Vers Empire in 1999 in a flashback sequence in "Darkness Visible".
Vers Pistol
The Vers uses a fictionalized pistol in the series.
Submachine Guns
Kedr PP-91
A UFE soldier inside Count Saazbaum's Landing Castle shoots at Slaine with a Kedr PP-91
Heckler & Koch MP7A1
During the assault on the moon base, the UFE infiltration team is equipped with Heckler & Koch MP7A1s.
IMI Uzi
Guards at a UFE-manned prison complex in Yemen are armed with Uzis when Count Mazuurek escapes from the prison. Guards in a prison complex at Episode 24 also are wielding the Uzi.
Assault Rifles
M4 Carbine
UFE forces are seen with M4 Carbines as their primary weapon, first seen in "This Side of Paradise".
Vers Assault Rifle
The Vers ground forces attacking the United Forces of Earth HQ and defending Count Saazbaum's Landing Castles are equipped with that appears to be a fictional assault rifle bearing resemblance to a FN F2000 front and a PP-2000 rear. It is first seen in "Wind, Snow and Stars".
Machine Guns
Browning M2
During the Vers War in 1999, The United Forces of Earth has Browning M2 equipped on their tanks in a flashback sequence in "Darkness Visible"..
General Dynamics M61 Vulcan
General Dynamics M61 Vulcans are used by United Earth Navy and Air Force vehicles, first seen in "Beyond the Horizon".
Grenade Launchers
Milkor MGL Mk 1L
Asseylum is seen firing smoke grenades from a MGL Mk. 1L to combat Trillram's Kataphrakt camera receivers in "The Children's Echelon".
Heckler & Koch HK69A1
Inaho uses a Heckler & Koch HK69A1 grenade launcher to fire smoke grenades to inhibit Trillram's navigation in "The Children's Echelon".
Heckler & Koch AG36
Yuki Kaizuka uses a Heckler & Koch AG36 as a flare gun to signal an attack in Episode 3.
Rocket Launcher
Vers Rocket Launcer
The Vers forces attacking the UFE HQ and defending Count Saazbaum's Landing Castle have a fictional Vers Rocket Launcher at their disposal in "Wind, Snow and Stars"..
Grenades
M67 hand grenade
Yuki Kaizuka uses a M67 Hand Grenade during the breach of Count Saazbaum's Landing Castle.
Vers Grenade
Count Klancain uses a grenade against UFE infiltrators in the Moon Base. It has a green cylinder shape.
UFE Kataphrakt Weaponry
The United Forces of Earth and Vers Forces uses mechas called "Kataphrakts". The UFE's current running models are the KG-7 Areion, which is standard issue, and the KG-6 Sleipnir, which is used for training.
Kataphrakt Pistol
A pistol is carried by the UFE Kataphrakts as a sidearm if their primary runs dry.
Kataphrakt 75mm Cannon
The main armament of the UFE Kataphrakts. The auto-cannon fires 75mm rounds in a bullpup configuration, with the charging handle on the right side and ejects spent casing upwards. The rounds come in high-explosives (HE), armor-piercing (AP), and tracers to adapt the situation. The cannon can also be equipped with an underslung grenade launcher for extra firepower.
Kataphrakt Precision Rifle
A rifle carried by the UFE Kataphrakts. It seems to fill in the role of a designated-marksman rifle.
Kataphrakt Anti-Materiel Rifle
An anti-materiel rifle wielded by the UFE Kataphrakts. It is capable of destroying structures.
Kataphrakt Grenade Launchers
A grenade launcher wielded by UFE Kataphrakts. It works on a lever-action mechanism to load grenades into the firing chamber.
Kataphrakt Recoilless Rifle
A UFE Kataphrakt rifle that is used exclusively in space battles against the Vers forces. It vents out part of the ammo's propellants out through the back.