So, here's a sample setting that just goes through and grabs some of
every element in the order presented in the Worldbook.

NAME: Cosmo Gundam

THE FACTIONS

     EG: The League of Humanity, a Chinese-dominated polity that arose
shortly before the move to space.  It has become static and inflexible, with
an immense bureaucracy that ensures order and harmony at the cost of those
who fall through the cracks.
     CS: Ritterkreuz, first founded by a cadre of explorers operating out of
Lagrange One.  These explorers became very wealthy and started buying
property in Lagrange Four, eventually building up a military force of Mobile
Knights that conquered Lagrange Five and moved on to Earth.  Their bone of
contention is the view that mankind should be free to explore its potential,
not bound by bureaucracy.  Of course, they end up rigidly military pretty
quickly, but it's nice rhetoric.
     "Neutrals": The smaller Cluster at Lagrange Two claimed neutrality, but
their large Chinese population made them sympathetic to the League.  Also,
the semi-independent nation of Australia has never cared for the League, and
offers the Ritterkreuz aid under the table.
     True Neutrals: Switzerland, shockingly enough.  Mars Station is also
neutral, mainly because it's almost a year away from everything and too
marginal to afford to get involved in politics.
     New Factions: The Helvetican Guard emerges during the Muddle, after
Switzerland is stomped flat by Ritterkreuz forces AND sold out by the
League.  

CONCEPTS

     The Calendar: Restarted at year zero when the League of Humanity's
charter was ratified.  It is now League Year 65.  The first Colony opened in
LY12. 
     The War: Started early in LY65 by the lightning-fast conquest of
Lagrange Five.
     The Atrocity: Lagrange Five's main defensive system was Fort Zemin.  An
asteroid was maneuvered to smash into it, but an insufficiently effective
defense by the Fort resulted in two civilian Colonies being hit by enough
debris to destroy them.  Each side blames the other for the civilian
casualties. 
     The Plot Device: The Graviton Generator.  It allows for reactionless
movement in space as well as limited flight on Earth (thrusters are often
added to increase speed and maneuverability).  However, it interferes with
inertial guidance systems and has an additional side effect of interacting
with the GravitoWeak Force, slowing nuclear reactions just enough that
critical mass cannot be achieved (although atomic power plants still
function, albeit at reduced efficiency).
     The Counter Plot Device: Homo Cosmo, the man of space.  They get brief
flashes of the future, letting them fire missiles on ballistic paths so that
they will arrive on target without the need for guidance systems.
     The Mutant Pilot: Homo Cosmo.  Those born in the Lagranges are somehow
less connected to linear time, possibly a result of radiation unlocking a
dormant human potential.  Their glimpses of the future make them excellent
pilots and fighters, but also make social interactions difficult.  This is
because they sometimes respond to things not yet said, and generally seem
"dreamy".  In the Endgame, there are a few artificially induced Homo Cosmos,
but the extreme radiation used to trigger their talents also means they will
likely die in months, if not weeks, so they tend to be suicidally insane.  No
Homo Cosmo can see more than a few seconds ahead, however.  At the start of
the story, the existence of Homo Cosmo is only a rumor circulating among
certain scientists.
     The Apocalypse Plan: The leader of Ritterkreuz has, in desperation, made
himself an induced Homo Cosmo.  He becomes convinced that he has had a
long-range vision of humanity elevated to the status of Homo Cosmo, but he
needs to stop Earth's dynamo in order to allow enough radiation to reach the
ground to accomplish this.  To that end, massive magnetic cannons are
constructed in L4 and L5 in an attempt to harness solar flares to destroy
Earth's magnetic field.

THE GEAR

     The Space Colony: A standard cylinder-with-mirrors design for civilian
Colonies.  Resource asteroids are irregular in shape and mined out inside,
they generally lack spin-induced artificial gravity.  Military installations
are closed-type O'Neills.
     The Colony Cluster: Simply referred to by their Lagrange points.  L4 and
L5 are large clusters, with dozens of Colonies.  L1 is smaller and more
scientificially oriented, with perhaps five or six Colonies.  L2 is the
smallest, with only one major Colony, but a large number of resource
asteroids. 
     The Mobile Suit: The SR-12 (StahlRitter) Stefan is the first combat-
ready suit deployed by Ritterkreuz in their attack on L5.  It resembles a
suit of medieval plate armor with cylindrical helmets.  Rank and file are
black with silver accents, while officers are silver with black accents and a
particle accelerator weapon resembling a lance.  The League begins with
aerospace fighters in space and tanks on the ground.
     The Mobile Armor: Ritterkreuz MAs are generally built as troop carriers
with some offensive capacity.  The most fanciful model resembles a horse, and
is ridden by officer SR-12s (and later suits).  The League develops Mobile
Armor before mass-produced Mobile Suits, generally built along the lines of
aerospace fighters and tanks, but larger and carrying Graviton Generators.
     The Gundam: Secret factories hidden among the resource asteroids of L2
work on project Sun Wukong, the stone monkey of Chinese folklore.  The first
prototype is SW-01X, also called the General Utility Neo-Defense Assault
Machine, or GUNDAM.  It uses the Graviton Generator to produce a true
defensive screen integrated into its armor, making it immune to most
weaponfire.  It also has the Gravity Staff, which generates a glowing blade
of gravitic force at either end, for close combat.  An array of machineguns
and rocket launchers round out its initial complement of weaponry, although
it later gets equipped with the Gravity Bazooka for a greater ranged punch.
     The Other Gundams: The SW-01M is a somewhat less powerful version
produced on Earth in limited numbers.  The Cygnus acquires a trio of them
during the Muddle for the Kids to pilot.  They are nicknamed Sandy, Baije and
Tripitaka.  After the destruction of L2, the Ritterkreuz captures enough
plans and materiel to build the SR-18 Leopold, which is comparable in power
to the SW-01M, but looks like an upgraded Stefan.
     The Boss Gundam: The SR-23 Wilhelm harnesses the power of an
artificially generated black hole.  Squat and powerful, it lacks the stylings
of the other StahlRitters, because it is rushed into service with armor just
bolted on to cover as much as possible.
     The White Ship: The Cygnus was built on L2 to carry the prototypes to
Earth, and to launch them in combat if absolutely necessary.  A sort of
Q-ship, it looks like an unarmed transorbital ferry, but can deploy a
reasonable assortment of anti-aircraft weaponry.  It is later equipped with a
larger version of the Gravity Bazooka.

THE CHARACTERS

     The Hero: Gee Four, son of brilliant gravitic engineer Joon Four (the
family name is later revealed to be common among those who abandoned their
old homes to take up residence in an L4 Colony...there's a lot of Fives on
the L5 Colonies, too).  His mother divorced his father shortly after he was
born, and still lives in the L4 colonies.  Joon moved with his son to L2 in
LY57 to work on the Graviton Generator, and soon found himself part of
Project Sun Wukong.  Gee has become something of an engineering prodigy in an
attempt to have some basis for interaction with his somewhat distant father,
and has an amazing intuition when it comes to the Graviton Generator.  Only
his young age has kept his father from bringing him in on the GUNDAM
project.  It turns out that constant work with graviton experiments during
adolescence has amped up his natural Homo Cosmo nature, but at the start of
the story Gee thinks of his glimpses into the future as just being a vivid
imagination and good intuition.
     The Kids: Jack Five - Gee's best friend on L2 growing up, he's a jock
who dreams of being a fighter pilot.  He gets his wish on the Cygnus.
Surilia Myan - Neighbor of the Fours, she often plays big sister or mother
hen to Gee when he gets too wrapped up in a project and does things like
forget to eat.  She ends up the de facto nurse on the Cygnus.  Antonio
Vasquez - Raised on Earth, he's only lived on L2 for a few months, and still
hates it.  He's a scrapper and a loner, but flourishes under military
discipline as the Cygnus's radar operator.  Bobo - Not his real name, but the
only one he'll answer to.  Withdrawn mechanical genius (on a practical level,
to Gee's more theoretical understanding), he ends up in the hangar bay.
Karen Sonntag - School friend of Gee's, would be his girlfriend if he'd just
notice.  Drifts towards Haile Smith once she realizes that she has no chance
with Gee.
     The Junior Officers: There was no official crew for the Cygnus at the
time of the attack on L2, just a few technicians from the League who were
there to supervise the final fitting-out.  Lieutenant Sara Jameson - Head of
the tech team, she was a washout from command school...but the only member of
the team with any combat command training at all.  Sgt. Jianjun Pi - Aging
and gruff techie, he ends up running engineering.  He has a lot of experience
in his area of specialty, but has never seen combat before, so he has trouble
dealing with it at first.  Ensign Ray Potter - Navigation systems specialist,
which means he gets to be helmsman.  While he knows how everything is
supposed to work and can fly things on shakedown cruises, he doesn't know
combat piloting for squat.  Ensign Jamie Potter - Ray's twin sister, her
specialty is environmental control, which means she's generally on damage
control.  Rarely without a smudge of grease on her person somewhere.
     The Mysterious Woman: Karen Sonntag.  She doesn't know that she's
actually the niece of Hermann Kleinmann, the head of the Ritterkreuz.  When
she finds out, she tries to keep it secret, but eventually it comes out.
She's torn between loyalty to family and to friends.
     The Veteran: Haile Smith.  He was going to be the Gundam's test pilot,
and he resents that Gee flies it better than he could hope to.  He eventually
gets to pilot Sandy (Jack Five and Karina Maastrict pilot the other two
SW-01M's).  Initially uncomfortable with Karen's attentions, he will
eventually be willing to give his life to save her from her uncle.
     The Masked Nemesis: Jacques Fermin, the Emerald Knight, starts off
piloting a green Stefan command type, later moving to a Leopold.  He's
secretly Gee Four's MOTHER, Jacqueline Four (nee Champion), but always wears
a full suit of stylized armor that conceals her gender.  She's a natural
pilot, but not a Homo Cosmo, and rose quickly through the Ritterkreuz after
the divorce.  It turns out the real reason for the split between Gee's
parents was her politics, not Joon's work.  She will try to woo Gee over to
the Ritterkreuz over the course of the story, but recognizes that he's too
dangerous to be allowed to live as an enemy, so will regretfully kill him if
she gets the chance.
     The Protege: Jason Champion, nephew to the Emerald Knight and cousin to
Gee Four, is also a Homo Cosmo.  He suspects that the Emerald Knight is
someone close to him under that armor.  Once he finds out he's related to Gee
Four, he becomes conflicted, and this conflict results in his death (possibly
saving Gee from a death blow administered by the Emerald Knight).
     The Peacemaker: Suizanne Grolier, daughter of the Elector of
Switzerland.  She has a minor role, mostly as a rallying point for the
Helveticans after the destruction of Switzerland.
     Noble Enemies: Baron Gerald Lombard, commander of the 23rd Mobile
Cavalry stationed in Afghanistan, also known as the Desert Bear.  Getting
past him is the last major obstacle before reaching "safety" in India, and
Gee and Karen spend a few days as his guests while pretending to be refugees
(he knows better, but lets them get away with it).  Pathfinder Karina
Maastrict starts as one of the Emerald Knight's scouts, and eventually
commands her own unit during the Muddle.  She never loses sight of the ideals
of the Ritterkreuz, and it gets her a knife in the back as she's sent on a
suicide mission to stop the Gundam.  She finally switches sides and joins the
Helveticans. 
     Scummy Enemies: General Subramanian of Hyderabad Base doesn't trust the
crew of the Cygnus, and tries to use them against the Desert Bear while
denying them sanctuary.  Baron Rudolph Kleinmann (cousin to Karen Sonntag) is
a vainglorious fool who tries to use dirty tricks against the Cygnus on
several occasions before being killed (secretly) by the Emerald Knight, who
considers him an embarrassment to the Ritterkreuz.

THE STORY

     Pregame: Events as related above.
     The Opening Moves: The Emerald Knight leads a small task force of
Stefans to investigate reports of the Gundam being transported to the
civilian colony at L2 for testing.  Things get out of hand, and the colony
has to be evacuated.  Gee and the Kids end up in the hangar holding the
Cygnus, and an intuitive flash tells Gee he needs to get into the Gundam.
Doing so, he fights off the Stefans as the Emerald Knight watches,
impressed.  
     The Run To Earth: Harried by the EK's forces, the Cygnus whips around
Earth to the L3 colony, only to find it has just declared neutrality.  Turned
away after loading minimal supplies, they hide among some of the destroyed L5
colony debris and find some usable aerospace fighters in the ruins of Fort
Zemin.  An orbital counterattack by the League gives them a chance to make it
through the low-orbit cordon set up by the Ritterkreuz, but they don't get to
choose where they land.
     The Midgame: Landing in northern Africa, the Cygnus must fight through
Ritterkreuz-controlled territory to the Hyderabad base in India.  Once there,
they manage to re-equip and pick up some SM-01M units, but there is a lot of
subterfuge and backbiting.  It seems like the Cygnus is only being resupplied
so it can be a better stalking horse...the League leadership likes having
Ritterkreuz forces diverted by chasing it around.  They get some new crew
members, mostly misfits that the military would like to get rid of but can't
be bothered to court martial.
     The Muddle: Battle lines shift and flow on Earth, and the League draws
the Ritterkreuz into attacking Switzerland in order to shut up an annoying
voice for peace.  The League gets the SM-02R series of Mobile Suits into
play, and the SR-13 Fritz units are deployed to match them.  However, the
League's superior resource base is coming into play now that initial
confusion and bureaucratic delays have cleared up.  The Helveticans form, and
the Cygnus joins them after being jerked around one time too many by the
League.  
     The Endgame: The leader of Ritterkreuz tries to put his Apocalypse Plan
into effect, although most think it's merely a tactical move to disrupt
League communications and power transmission (which it will also do, mind
you).  The League's SM-03X Dragon King is deployed to hunt down the Cygnus,
but its pilot is convinced to go stop the magnetic cannon at L4.  At L5, it's
a showdown between mother and son (who now both know the score), and the
Emerald Knight ends up throwing herself into the barrel of the magnetic
cannon to stop the destruction of the Earth.  An enraged and tearful Gee
pilots his Gundam into the Ritterkreuz flagship, causing it to explode,
killing Kleinmann (and a whole lot of others).  There is no sign of Gee or
the Gundam afterward.  The Helveticans, as the only major force left (the
League and Ritterkreuz battered each other pretty heavily), guide the
battered remains of humanity into a new future.
     The Side Stories: A tragic tale of a noble Stefan pilot who ends up
dying in battle with the Gundam (a fight that takes about 2 seconds in the
main story).  A romance between an L4 resident and an L5 resident brought
together by the invasion, yet unable to get past the events that let them
meet.  
     The Sequels: Gee is revealed to have used the black hole generator
(taken from the Wilhelm just before it flew off into the magnetic cannon) to
create a wormhole, and he popped out near the Mars Station.  A group of
refugee Ritterkreuz arrive soon after, and he has to get his Gundam repaired
with the limited resources available in order to defend the colonists.