Kazuar:

Campaign Only Unit
The smallest mech at GDI's law enforcing arm disposal. Armed with three guns, the kazuar excels at pinning infantry, making it ideal to suppress riots and to defend small cities against small raids. It's light design allows the kazuar to reach higher speeds in comparison to other mechs in GDI's army; but it's also a disadvantage, having little armor kazuars need to be protected by other heavier units during combat.
Titan Mk.II:

Second generation mech based upon the Titian design. The original model was upgraded with a secondary attack system, a disk grenade launcher, with this system, the new Titan has the ability to perform precise attacks or to damage a small group of units. However, this unit has to deploy to activate it, so it can't use both systems at a time.
Hover MLRS:

The newest version of an old unit, the modern Hover MLRS version, carries more rockets than before, which also travel a longer distance, but are less powerful. Great mobility and AA capabilities, make the Hover MLRS an excellent support unit for bigger mechs.
Golem:

Developed during the war as a base for research into new technologies. It was, originally conceived to be a civilian industrial mech; was putted into active service when the GDI realized that it needed a heavy field repair unit. However golems also have the ability to attack its enemies and a strong armor, this makes golems, the perfect support unit for the GDI armored divisions.
*Golems from starports come in repair mode by default, to change them to the attack mode, just order them to deploy using the "deploy hotkey".
Juggernaut:

These fearsome mechs, are an important part of the GDI's armed forces. However they were almost retired in favor of a more powerful design. But thanks to the Brotherhood and a raid on a research facility, most of the prototypes were destroyed, or captured [Campaign Spoiler].
Minotaur:

A big, short range missile platform, mounted in two carrier units. Possessing a big amount of armor, the minotaur is a heavy support battle mech with excellent AA capabilities. This mech is very slow in comparison to the Hover MLRS; but it has the same speed as other mechs, making the minotaur a great mobile turret, or a good support unit for ceberus class mechs.
Cerberus:

Following an old concept, the GDI wanted to implement a mammoth tank successor in the form of a mech, using this time, the removed from service, Juggernaut. This mech has a great firepower with the use of it's three cannons that gave it it's name, but it has not AA capabilities, so AA support is advised.
*This unit is based in LKO's medusa, and was edited by me under his permission, the proper credits are already given.
Disruptor:

Another unit that returns from the previous war. Armed with a powerful new generation sonic wave emitter this unit is able to crumble buildings in seconds. With the inclusion of a secondary quick fire mode it has become quite deadly to infantry, even more than before. Disruptor are also able to reveal stealthed infantry as it's weapon also functions as a sensor.
Leviathan:

The Leviathan is the newest addition to the GDI army, this prototype was designed to replace the old and outdated Mammoth MK II, which were retired from active service due to several design issues.
This mech was designed by General Walkers in one of the few remaining areas under GDI's control; however this area stays top secret, to prevent another stealing attempt by the Brotherhood, like what happened with the mech research facility at potsdam[Campaign Spoiler] .
This post has been edited by Machine: Aug 9 2007, 06:14 PM