Although this is genius (I am also a Halo fanatic, read all the books and I have a knowledge base in Halo as well.) there are a lot of people who are still working on other mods for this game already (graphic enhancements, TC (total conversion) mods, etc) and not to mention, if you've seen sketches of the rendered Halo universe ships, they're many times more complex in both shape and design. Also, we've never seen what their shipyards look like... but we have seen the super-MAC platforms, hee hee.

In order to keep this possibility alive, keep this in the back of your heads. Recruit some designers and sketchers because I believe with the Halo universe and this game, it's going to end up much like a TC mod.

I too a Halo fanatic agree that a Halo mod is possible. I am truly a terrible modder and I can only supply ideas.

An idea or two:
Ships
Frigates

UNSC Frigates:
Frigate(of course)
Corvette
Halcyon Cruiser(ya, I know, let me get to it)
Colony ship

Cruisers:
Carrier
Prowler
Destroyer
Mobile ship repair(like the cradle in the book Fall of Reach)

Capital Ships:
Super Carrier(stronger than Marathon classhttp://halo-gamespot.wikia.com/wiki/UNSC_Supercarrier)
Marathon Class cruiser
up graded Halcyon(like PoA)
Phoenix class colony ship(http://halo-gamespot.wikia.com/wiki/Phoenix-class_Colony_Ship)

UNSC Abilities:
Bombardment: should be givin to all ships that have nukes
Invasion:gradually kills off population and planet health: Super Carrier/Carrier
Boarding parties: has x amount of percent chance of destroying a ship

ill get back with more ideas later  

Im currently working on a species diversification mod which does change it around a little to be like halo (at least in the sense that your a lot closer to halo after my mod then before it) so once i finish up TEC and Advent forces ill put it up for beta and you can use it from there. Two new gauss cannon abilities have been added, shields have been removed from tec ships, burn effects will be added to plasma weapons etc.

Just so ya all know you wont have to start entirely from scratch.

This game can EASILY be incorporated into a Halo RTS Space Combat game. Not to mention the Advent and TEC are already close enough to Covenant and Humans in ship design and weapons.
Actually, now that I think about it, the plotline is also very similar as well. (Not with Advent, but with Vasari and TEC. Aliens invade Earth, Earth getting its ass kicked for awhile, Earth making a comback, etc.)

You know, I'm wondering when there will be a Star Wars or Star Trek Mod. I know they already have games like Sins for their respective series, but I mean, who wouldn't want their TEC capital ship to be the freaking enterprise? Hell, a awesome game would be Star Trek vs Star Wars.

It would be a great idea, and as a huge halo fiction freak, it would translate well.
Here is some ideas. Human superweapon could either be planetary MAC cannon(better than orbital MAC cannons) or someway to implement the NOVA bomb into the game, which would take out everything in the gravity well. There would be plenty of flagships for each race. Such as covie supercarriers and assualt carriers and UNSC flagships, even special hero ships like Pillar of Autumn, which was a smaller ship, but had special technology on it and could take a beating(honeycombed infastructure and overlayed fusion reactors). Support ships could be the refitting ships like the UNSC Cradle and for covenant, the Infinite Succor(among many others). You could have a field day with planets ala something like Sins Plus. Just some examples, Harvest could support many trade stations and have a trade bonus. Reach could hold many more tactical slots than an average planet. Pegasi Delta could hold more logistic slots than normal(covie industrial world that was destroyed in the prologue of GoO) Human starting planet would be Earth(duh) and covenant would be High Charity. Instead of pirates, you would have rebels that live on the asteroids like Colonel Watts rebel force living in the asteroid.

This is all a small example of things that could be easily implemented, and that was just off of the top of my head.

 rebel group that is apart from the UNSC
-these guys could be the pirates along with the Heritics for the covenant, which works well because in sins the pirates are generally weaker than their larger faction counter parts

superweaponUNSC
-could possibly be the Spartan program. Build a really big orbital structure and target planets.
-Novabomb as said above this post

artifacts
-forerunner artifacts sound pretty good for planet bonuses and artifacts

UNSC Ships:

Marathon-class Cruiser
Production information
Class
Cruiser Super Cruiser
Technical specifications
Length
1192 meters 1303yds
Mass
100,000 tons
Slipspace Drive
Yes
Slipspace velocity
2.1 ligt-years/day
Hull
Resistant to Multiple Plasma Torpedoes
Armament
 Heavy (Speculation) Magnetic Accelerator Cannon
 128+ Archer Missile Pods (estimate)
 40+ 50mm point defense guns (estimate)
 Shiva-class nuclear warheads (Speculation)
Complement
 Albatross Dropships (speculation)
 Elephant transports (speculation)
 Mongoose transports (assumed
 Pelican dropships (assumed)
 Scorpion Tanks (assumed)
 Warthogs (assumed)
 C709 Longsword-class Starfighters (squadron or less)
Usage
Affiliation
United Nations Space Command

Halcyon Class Cruiser
Production information
Class
Cruiser
Technical specifications
Length
1170 meters 1279yds
Width
352 meters (1155.73 feet)
Height/depth
414 meters (1359.69 feet)
Slipspace Drive
Yes
Slipspace velocity
2.1ly/d
Armament
 Magnetic Accelerator Cannon (1)
 Archer missile pods (6)
 50mm point defense guns
Complement
 Pelicans (6+)
 Longswords (7+)
 Hevs
 Warthogs
 Scorpion Tanks
 UNSC Marines
 Shortsword bombers (possibly)
Usage
Affiliation
United Nations Space Command

Super Carrier
Production information
Class
Carrier
Technical specifications
Length
Greater then 2000 meters
Mass
Greater than 1600tons
Slipspace Drive
Yes
Power plant
Fusion Cores (possibly multiple)
Slipspace velocity
2.1 light-years/day (estimated)
Shielding
None
Hull
3meters Titanium-A Battle Plate
Armament
 2 or more Magnetic Accelerator Cannon(conjecturalized)
 Archer Missiles(52)(conjecturalized)
 Shiva Nuclear Warheads
Complement
 Longsword Interceptors (conjecturalized)
 Pelicans(36)
 Scorpions(10)
 Warthogs(12)
 Albatross Dropships(3)
 Hevs
 Orbital Drop Shock Troopers
 UNSC Marines
 Shortsword bombers (conjecturalized)
Usage
Affiliation
United Nations Space Command

Class
Destroyer
Technical specifications
Length
485 meters 530yds
Mass
8000 tons
Slipspace Drive
Equipped
Slipspace velocity
2.1 light-years/day
Power plant
Deuterium fusion cores
Hull
2 meters Titanium-A battleplate
Armament
 Magnetic Accelerator Cannons (2)
 Shiva missiles (3)
 Oversized Archer Missile pods (26)
Complement
Pelican Dropships
Marines
Warthogs (5)
Scorpions (3)
Usage
Year introduced
2513 - Operation: TREBUCHET
Affiliation
 United Nations Space Command

Production information
Class
Frigate
Technical specifications
Length
478 Meters 522yds
Width
151.9 Meters (498 feet)
Height/depth
112.2 Meters (396 feet)
Mass
4000 tons
Engine unit(s)
 Main drives (2)
 Auxiliary drives (2)
Slipspace Drive
Yes
Slipspace velocity
2.1 light-years/day
Power plant
Deuterium fusion cores (2)
Hull
60 centimeters Titanium-A battleplate
Armament
 Magnetic Accelerator Cannon (1)
Ammunition: Less than 6 rounds
 Shiva Nuclear Warhead Missiles (3)
 Archer missile pods (26) 30 Missiles/Pod
 50mm Point-Defense Autocannons (4)
Complement
 Albatross dropships (1+)
 Elephants (2+)
 Mongooses
 Pelican dropships (16+)
 Scorpion Tanks (3+)
 Warthogs
 Marines and Orbital Drop Shock Troopers
 Clarion Spy Drones (3)
 C709 Longsword-class Starfighters (Squadron+)
Class
Prowler
Technical specifications
Length
162 meters 177yds
Slipspace Drive
Yes
Hull
Resistant to several pulse laser bursts
Countermeasures
 Ablative baffles
 Counter electronic systems
 Matte black ablative stealth coating
 Texture bufferers
Armament
Minimal
 Pulse Lasers (2+)
 HORNET mines (14)
Complement
None
Crew
90 crewmen
Minimum crew
43 crewmen
Usage
Affiliation
Office of Naval Intelligence (UNSC)

got this off of:
http://halo-gamespot.wikia.com/wiki/Main_Page

more to come  

The great thing is that in fact, in the halo books, there are human pirates armed with nukes and such.

Why not have several new races "races" that include the best of their 'universe'? ;]

Starwars
Startrek
Halo
Battlestar Galatica

That would be a fun mod imo.

Well, if we're talking about theoretical units...

I don't know if it's actually possible to add a race into this game yet, so I'm assuming the mod would just be using the TEC and replacing their units with UNSC units. So I guess the obvious replacements would be

Gauss Defense Platform = Orbital Defense Platform. Pretty obvious. They pretty much fulfill the same purpose. The ODP's might have to be toned down a bit from canon though, just for gameplay purposes. One-shotting a capital ship every 30 seconds probably isn't fun for the other player.

Arcova Scout Frigate = Prowler. Again, same basic purpose. I don't believe we've ever seen one yet, but I don't think they'd be that hard to do. I've always kind of imagined them looking akin to modern day stealth aircraft, just much larger. I don't know if any of you have ever played Civilization IV before, but in the beyond the sword expansion, there's a space scenario, and the "stealth ship" unit from that looks pretty spot-on for how a Prowler would look. Maybe you could give it a researchable ability to disappear off sensors for a few seconds or something to give it the "stealth" capabilities.

Cobalt Light Frigate = Corvette. This would be the hardest model I think, we haven't seen them or even had a decent description to my knowledge, so it'd mostly be left up to the creator's imagination I suppose. Their general purpose seems to match up though. Small, cheap, easy to mass produce ship.

Javelis LRM Frigate = Frigate. This would be the easiest model to do, by far. We've seen more of this ship than of any of the others combined. I think the mission profile's would match up too. In Amber Clad and Forward Unto Dawn were both designated as "FFG", which is what the current US Navy uses for "Guided Missile Frigate", so apparently the Archer missile pods were the "main" weapons, not the MAC. So I think it would be a good, canon replacement for the Javelis' "distance" role.

Kodiak Heavy Cruiser = Destroyer. Something else that would need to be done entirely from imagination unfortunately. But I think the purpose of the two ships match up pretty well.

Kol Battleship = Marathon Cruiser. We've seen enough of it to make a model pretty easy. And they both have the role of "biggest and baddest ship in space".

Dunov or Akkan Battlecruiser = Halcyon Cruiser. I don't think it would really matter which of the two it replaced, it'd be a good match for either IMO.

Marza Dreadnought = Spirit of Fire-type. The Marza seems to be the "planetary assault ship", and thats mostly what Spirit of Fire is for. Maybe you could give it a special ability where instead of just nuking the planet, you'll see it send dropships down to the planet's surface every so often, until the planet's population is dropped to 0 and you instantly gain the planet, instead of needing to nuke it until the pop and health are both 0 and then re-colonize it.

Sova carrier = Carrier. Pretty obvious. As for how it would look, you might base it off a battlestar from the new Galactica series, given the similar mission roles and technology levels between the two.

hope this helps with the covenant:

Seraph Starfighter
Production information
Model Seraph-class Starfighter
Class Starfighter
Technical specifications
Length 27.8 meters (91.3 feet)
Armament Heavy Plasma Cannon, Pulse Laser, Plasma Charge

Crew 2 (1 Pilot and 1 Co-Pilot)
Usage
Era(s) 9th Age of Reclamation

Affiliation Covenant


Stealth Corvette
Production information
Class Corvette
Technical specifications
Length Less than 485 meters
Mass Less than 8000 tons[1]

Hull About 1 MAC shell
Sensor systems Laser beam transciever[2]

Countermeasures Stealth system
Fire-control jammers
Armament None
Usage
Year introduced 2552 - Battle of Sigma Octanus IV

Role(s) Electronic intelligence
Electronic warfare
Affiliation Covenant


Covenant Frigate
Production information
Class Frigate
Technical specifications
Length 1000 meters
Shielding Resistant to 1 Shiva-class nuclear warhead or 1 Energy Projector shot

Hull Resistant to 1 MAC round and 225 Archer missiles or 1 Plasma Torpedo or 1 Plasma Turret shot

Countermeasures Anti-Plasma Torpedo counterguiding signal system

Armament Pulse Laser turrets
Lateral Plasma Torpedo launcher (1)

Usage
Year introduced 2552 - Battle of Sigma Octanus IV

Affiliation Covenant


Covenant Destroyer
Production information
Class Destroyer
Technical specifications
Length 1500 meters
Shielding Resistance to 1 plasma torpedo or 2 MAC rounds or 1 Energy Projector hit

Hull Resistance to 1 plasma torpedo or 1+ MAC rounds

Armament Pulse Laser turrets
Lateral Plasma torpedo tubes (2)

Complement Seraph-class starfighters
Spirit-class Dropships
Jiralhanaes
Lekgolos
Kig-yars
Unggoys

Usage
Year introduced 2552 - Battle of Sigma Octanus IV

Affiliation Covenant


Covenant Light Cruiser

Production information
Manufacturer Covenant
Class Cruiser
Technical specifications
Length 300 meters
Usage
Year introduced 2552 - Battle of Reach

Affiliation Covenant


Covenant Cruiser
Production information
Class Cruiser
Technical specifications
Length 1000-1455 meters
Slipspace Drive Yes
Shielding Resistance to 1 Plasma Turret burst

Hull Resistance to 2 Plasma Turret bursts or 1 Shiva missile

Armament Plasma Turrets (5)
Laterally-mounted Pulse Lasers

Complement None
Usage
Affiliation Covenant


CCS-class Battlecruiser
Production information
Manufacturer Covenant
Model Battlecruiser
Technical specifications
Length 1,782.2 meters (5,847.1 feet)
Width 861.7 meters (2,827.1 feet)
Height/depth 230.8 meters (757.2 feet)
Slipspace Drive Yes
Slipspace velocity Faster than 2.1 ly/day
Shielding Yes
Hull Few MAC shells
Armament Pulse Laser Turrets
Plasma Torpedos
Energy Projector(1)

Complement Thousands of infantry
Grunts
Jackals
Elites
Hunters
Ghosts
Banshees
Wraiths
8+ Spirits or Phantoms

Crew Elites or Brutes

Passengers Human prisoners
Cargo capacity Hundreds of vehicles
Usage
Role(s) Battlecruisers and Troop Transport
Era(s) Human-Covenant War

Affiliation Covenant


Reverence-class Cruiser
Production information
Class Cruiser
Technical specifications
Length 3000 meters (3 km)
Armament Energy Projector (2+)
Laterally-mounted Plasma Torpedo launchers (7)

Complement Seraph-class starfighters

Usage
Affiliation Covenant


Covenant Supercruiser
Production information
Class Cruiser
Technical specifications
Length Over 3576 meters
Slipspace Drive Yes
Shielding Resistant to 3 MAC rounds and 488 Archer missiles or 1+ Nuclear mines

Hull Resistant to greater than 1 Shiva missile

Armament 5 Energy Projector turret
Pulse Lasers
Plasma Torpedos

Usage
Year introduced 2552 - First Battle of Reach

Affiliation Covenant Navy


Covenant Carrier
Production information
Class Carrier

Technical specifications
Length 1455 meters
Shielding Resistant to 3 MAC rounds or greater than 1 Plasma Torpedo

Hull Resistant to 100 Archer missiles

Armament Pulse Laser turrets
Plasma Torpedo launchers (2+)

Complement 100+ Seraphs [1]
200+ Banshees
34 Spirits or Phantoms
3930+ Covenant troops
Grunts
Jackals
Hunters
Engineers

Usage
Affiliation Covenant


Assault Carrier
Production information
Manufacturer Covenant
Class Assault Carrier
Technical specifications
Length 5,346 meters[1]/ 17,540 feet/ ~3 miles

Slipspace Drive Yes
Slipspace velocity Faster than 2 ly/per day
Shielding Yes
Hull Several MAC rounds
Armament Pulse Laser Turrets
Energy Projectors
Plasma Torpedos

Complement Seraph-class starfighters
Banshees
Spirits
Phantoms
Covenant Drop Pods
Boarding Craft
Shadows
Scarabs

Crew Several thousand
Cargo capacity Few hundred vehicles
Usage
Role(s) 2552 - First Battle of Earth, Second Battle of Earth, Battle of Installation 00

Affiliation Covenant, later Covenant Separatists and Covenant Loyalists


Covenant Supercarrier
Production information
Manufacturer Covenant
Model Superecarrier
Class Carrier

Technical specifications
Length Longer than 5346 meters
Slipspace Drive yes
Slipspace velocity faster than 2ly/per day
Shielding Less than 1 NOVA Bomb

Hull Less than 1 NOVA Bomb

Armament Energy Projector (7+)
Plasma Torpedo
Pulse Laser Turret

Complement Greater than 36 Seraphs (conjecturalized)

Crew Few thousand
Passengers Troops, Crew
Usage
Year introduced 2552

Role(s) Patrol High Charity

Affiliation Covenant