A spin-off of Mythril Aces, also known as Galactic Soldier Troperion, Mythril Troperion Aeris Gaiden is an RP on the TV Tropes forum. It was created by Fauxlosophe as a Gaiden Game to the original RP, and as such many of it's tropes and details on the setting can be found on that page.
Like it's predecessor, Mythril Aces: Aeris Gaiden is set in our galaxy almost a thousand years in the future, where the two galactic superpowers, the Earth Federation and the Centauri Confederacy, war with each other in a massive, galaxy-wide conflict with no end in sight. Both factions use specially made mecha called Armored Mobile Frame, dubbed AMFs or Frames for short, which run off of a mysterious substance dubbed Mythril.
Unlike the original RP, which focuses on high-skill Aces and Knights operating on special missions, Aeris Gaiden is based around the trials and tribulations of ordinary pilots on the contested world of Aeris, a Federation world taken by the Centauri for many years, as a Federation fleet invades. It is notable for having a far less forgiving difficulty, as opposed to the original in which combat was considered fairly easy. It is also much shorter than it's sprawling, hundred plus page parent.
This Forum RPG contains examples of the following:
- Asskicking Equals Authority: Subverted and played straight. On one hand, kills can earn pilots quicker promotions. On the other, it's been shown that skill in a Frame doesn't make a pilot a good officer and just as often end up joining special forces, while those in command often avoid piloting if they can.
- A Mech by Any Other Name: The AMF (Armored Mobile Frame) and it's predecessor the ATMC (All-Terrain Mobile Chassis).
- Authority Equals Asskicking: Played straight. Commanders and officers are often former pilots with high kill scores, and many of them have significantly upgraded Frames.
- Blue Blood: Vestigial from the original game however on a much smaller scale. A couple players hail from old money, while only one holds a title [which is technically entirely honourary]. Also an insult used by Federation soldiers.
- Brick Joke: Many. Most notably "The Fighting Flying Electric Squirrels" arose from a complaint three months prior to their appearance about a gym leader in Pokemon Black in the discussion thread for the main RP. Many other attributed elements of Aeris from before the RP were subtlety pulled in, both serious and joking. But most make an appearance. Eventually.
- Critical Existence Failure: Averted. Frames take realistic damage and suffer from it's effects as they drop in health.
- Eternal English: Played with. Colonists speak a Franco-English creole invented for the purpose of the colonisation while various dialects of corrupted English, Mandarin and Swedish are spoken in various areas but the soldiers of the Federation and Confederacy speak standardized English based on what was spoken prior to the Centauri/Sol split only a hundred years from present day.
- Expanded Universe: The wiki, which extends the content seen in Aeris Gaiden and the original RP vastly, with heavily detailed worlds, languages, and cultures for both superpowers and several minor powers not yet mentioned at all in either RP.
- Frickin' Laser Beams and Swords: The Centauri as a whole, although rapid-fire weapons and snipers are also very popular, they use them much less in Aeris than in the original RP, replacing them with good old-fashioned firearms.
- Green Rocks: Mythril, in the expanded universe.
- Gundam: Heavily influenced, just like the original RP. Draws more inspiration from Mobile Suit Gundam: The 08th MS Team and similar series than the original.
- Last-Name Basis: Played straight and averted. Fairly common among higher level officers, what with it being a military setting, yet many low-level soldiers, particularly the players and their squads, refer to each other by their first names.
- Lower-Deck Episode: The entire series as a whole, to the main RP.
- Mildly Military: For the most part averted, though there is some allowance for the sake of the narrative.
- Put on a Bus: The mass desertion of about half the Centauri PC's after their players dropped the RP.
- Rag Tag Bunch Of Misfits: Both squads of PC's, with the Feds dipping into Rag Tag Bunch Of Mentally Unhealthy People And Phil on occasion.
- The Federation squads include a pyromaniac alcoholic with a tenuous grasp on reality, a shameless womanizer with a worrying attachment to his Frame, an insubordinate jaded ex-lawyer, an overly idealistic and enthusiastic by-the-book recruit, and... one fairly normal guy with a tendency to quote the Old Testament during battle.
- The Centauri include an honourary noble with an ego the size of a small planet, a wanna-be Film Noir detective who narrates things in a dramatic Internal Monologue, a fresh-faced new recruit with a love of strawberries, and a stoic sniper.
- Real Robot Genre: Played straight to the max. Frames are useless without teams of engineers, pilots and equipments are expensive but replaceable, and trying to be a hero will get you killed fast.
- Shout-Out: Many, to the point where the entire planet of Aeris is a Brick Joke Shout-Out to Final Fantasy VII from the original RP. Monty Python, Gundam, and Final Fantasy have numerous shout outs.
- Theme Naming: Quite a bit. Metals and Stones for Federation equipment made by the Metallurgy Corp, English Weaponry circa WWI and II for many Cents, Mythology for customs, and FFVII/Norse Mythology for Aeris itself.
- Space Marine: Subverted. They exist, but they are just regular soldiers who happen to perform boarding actions and fight in space. Regular marines and other infantry also exist and receive significantly more screen time.