Mobile Suit Gundam MS IGLOO is a CGI Gundam feature which takes place during the One Year War. Three series have been released under the title, each one three episodes long:
The Hidden One Year War, which follows the exploits of the crew of the Jotunheim, a Zeon cargo ship that is tasked with testing prototype weapons. This was originally exclusively shown at Bandai Museum in Matsudo, Japan but has seen a limited release on DVD.
Apocalypse 0079, which is set during the final month of the One Year War. As they slowly loose ground to the Earth Federation Forces, the Zeonic military begins sending previously-mothballed prototypes to the crew of the Jotunheim in a desperate attempt to find a new weapon against the encroaching Earth forces. Unlike its predicessor, this OVA series was released direct to DVD starting in April 2006.
MS IGLOO 2: The Gravity Front, a series of three separate stories told from the perspective of three different Earth Federation soldiers during the Zeon's invasion. Unlike the previous two OVAs, these stories are connected only by a single secondary character (Col. Michael Colmatta) and the ghastly spectre that haunts the soldiers. This OVA was released on DVD and Blu-ray starting in October 2008.
The director of MS IGLOO is Takashi Imanishi (previously directed Mobile Suit Gundam 0083: Stardust Memory), and Yutaka Izubuchi is the supervisor. There is also a manga series MS IGLOO 603 which start as an adaptation of The Hidden One Year War but later add its own content.
Action Girl - Monique Cadillac: She at first seems to just be an obnoxious officer, but when push comes to shove she'll gladly jump into the fray even if she's piloting a screaming metal death trap like the Zudah.
All-CGI Cartoon - The main thing that connects the two series released under this title is that they are the only examples of this trope in the Gundam franchise.
Incidentally, everybody who pilots/operates the titular suit/weapon of the episode dies before the end of said episode, with only Oliver May being the exception.
Arc Word: 'Shinigami' is prevalent throughout Gravity Front. Along with an actual Shinigami, it's also used to refer to the Zakus and a few other weapons.
Badass Normal - Engineering Lieutenant Oliver May, while piloting the Big Rang in episode 3 of Apocalypse. Lieutenant Ben Barberry from episode 1 of Gravity Front also, an infantryman who has more MS kills than most pilots, at the beginning of the war.
Bittersweet Ending - Oliver is astoundingly grateful to find that the war is over, even thought they've suffered great losses. Then finds out that neither side CARES what their leaders say.
It's no better when seen from the eyes of Feddie grunts. We're clued in to how The Gravity Front will be from the first episode.
BFG - The first weapon tested in Hidden One Year War, the Jormungand, is a massive anti-ship cannon.
The AMS Reginas used by Barberry's platoon in Gravity Front are rather large compared to their users.
Black Dude Dies First: He's the first one in the Guntank trio to go in episode 3 of Gravity Front (though the one in episode 1 is actually one of the last ones to go behind Barberry himself.)
The picture of the colony used in the Colony Drop, from the opening of Gravity Front, bears the watermark of 603 Technical Evaluation Unit, the protagonists from MS IGLOO 1.
Colmatta's battalion receives resupply from the Matilda Squadron in the first episode of Gravity Front, the same squadron that resupplies White Base in Mobile Suit Gundam.
The aiming scopes used in the Guntanks in the last episode of Gravity Front are virtual twins to the ones used by Amuro, Kai, and Hayato in the original Mobile Suit Gundam for their respective machines.
Decoy Protagonist: Barberry in the first episode in MS IGLOO 2, where the OVA shows by the end of the episode that it won't necessarily be sticking with a steady cast like its predecessor.
Does This Remind You of Anything? - In episode two of season three, there is a Tank platoon leader who was injured in combat and is obsessed with destroying the Zaku that wounded him. The color of the Zaku?: White.
Doomed Hometown - Subverted. Zeon manages to survive in no small part thanks to the protagonists of MS IGLOO 1.
This is something many characters share, saying that they've got no homes to return to because of the war.
Double Agent: Clyde Bettany in Gravity Front, though this doesn't save him from Arleen's revenge (granted, she doesn't find out until it's too late, but still.)
Flawed Prototype - Most of the prototypes that appear in MS IGLOO 1 are Awesome, but Impractical and were used as mere propaganda: the Jormungand is an outdated and useless cannon, the Hildolfr is tank that was already marked as a failure, the Zudah breaks apart if its thrusters are used at high output, the Oggo is just a worker pod outfitted with weapons (very much like the Ball).
Fragile Speedster - Surprisingly applied to the gigantic Zakus when fighting against Federation infantry/Tanks in gravity front. In general, the Average Zaku is shown to be VERY vulnerable to infantry deployed guided missiles and Type 61's cannon fire (The latter is somewhat justified, given that Mobile Suit Gundam: The 08th MS Team showed Suits on both sides using tank cannons as BFGs.). Provided the rounds hit of course. Fortunately even Mook Zakus seem capable doding cannon fire. Also overlaps with Glass Cannon, since the Zakus also have a tremendous firepower advantage over the tanks with their Machine guns and giant Bazookas.
Even more applicable in an ironic way to the Zudah. The Zudah is incredibly fast, capable out out-maneuvering a GM. However, if it goes too fast...
Heroic Sacrifice - Several times. The irony being that Zeon will lose no matter what the heroes do.
It's Personal - Primary motives of Herman Yandell and Arleen Nazon in Gravity Front.
Kill 'em All - It's almost as though Tomino himself directed the whole thing, especially Gravity Front.
Gravity Front only has two named characters survive to the end of the OVA. Not counting Shinigami, who isn't really alive to begin with.
Laughing Mad: Arleen in episode 3 of Gravity Front after activating her Guntank's self-destruct sequence.
Machine Empathy: Both Herman Yandell and Elmer Snell from the second episode of MS IGLOO 2: The Gravity Front claim to have very temperamental machines (a tank and a Zaku, respectively) that stop despite regular maintainance saying they should still run. This happens when the pilots can tell if the other is not on the battlefield they're going to since they both want to save their strength for their fated encounter.
Making Use of the Twin - The opening of Apocalypse saw Jotunheim getting hit and blowing up. Shortly afterwards, we see the crew of the Jotunheim learning that their sister ship, the Muspelheim, was destroyed during a drop operation.
Mid-Season Upgrade - A minor example, the Jotunheim gets rocket boosters to give it greater speed sometime between Hidden One Year War and Apocalypse.
Minovsky Physics - It's Universal Century, when are there not Minovsky Particles?
Moby Schtick - Episode 2 of Gravity Front features Ax-Crazy tank commander Herman Yandell, who's obsessed with finding and destroying a legendary Zaku II known as the "White Ogre" that wiped out his squadron and left him permanently scarred and with only one leg.
Needless to say, Oliver himself is utterly frightened to see the infamous White Devil that has killed so many of his comrades single-handedly...
Red Baron: Along with the Red Comet and White Devil making brief cameos in The Hidden One Year War, there's also the White Ogre in Gravity Front.
The Remnant - Horribly, horribly subverted as both sides who want to continue the war are shown to be utter madmen.
Series Continuity Error - The EMS-10 Zudah's model number seems to conflict with the previously established numbering scheme for Zeon mobile suits, which used YMS for prototypes. A mobile suit known as the EMS-05 Agg had shown up previously in the original MSV model kit line, where the E was apparently supposed to stand for Excavator rather than Experimental.
Shaggy Dog Story: The first episode of The Hidden One Year War has the cast getting ready to test an experimental cannon at Loum. Before it's even fired, though, the cannon is already rendered obsolete when a squad of Zakus led by Char arrive, and though Aleksandro tries to use it in the battle anyway, he ends up dying for nothing.
Shinigami: Pervades throughout The Gravity Front, as a spectral entity that causes nightmares for men on both sides.
Smug Snake: Colonel Colmatta in Gravity Front and Colonel von Kuspen in Apocalypse 0079. Colonels aren't treated with much respect in this series though von Kuspen gets to have a Heroic Sacrifice at A Baoa Qu.
Taking You with Me: The Guntanks in episode 3 of Gravity Front are effectively kamikaze fighters strapped to bombs so that they can blow themselves up when they're taken down. Arleen eventually does this to Bettany, only to immediately regret it afterwards when she realizes the truth behind his betrayal.
Tank-Fu - First by the Hidolfr, as when it's cannon and arms can't do the talking, a lifted corner of its 220-ton body gets the job done.
Used later with the 440-Guntank to help take out an enemy.
Tank Goodness - The Hildolfr in Hidden One Year War, and Type 61s and Magella Tanks in Gravity Front.