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