Described in OmniTech’s promotional material as "a deadly fusion of the King Crab and the   Marauder II," the   Colossus took Solaris VII by storm when it debuted in 3052. Using advanced pulse lasers and an assault autocannon, the first Colossus gained fame at the hands of Terra Belmond, dismantling one foe after another. OmniTech experienced an explosion of orders and it became the design that the "cool MechWarriors" wanted for a time, until the Berserker and other new BattleMechs came to Solaris. Then Terra Belmond left Solaris to become a mercenary, and OmniTech lost its most visible sales magnet.
         Colossus sales languished in the years that followed, spurred from time to time when they received gun camera footage of the design in action on the battlefields of the Human Sphere. OmniTech still fell into the back line of BattleMech producers though, becoming reliant on other companies' product, and went out of the notice of most companies, moving to the outskirts of Solaris where they ended up customizing BattleMechs in the Reaches.
         Ironically, that isolation saved them when the Word of Blake attacked and took over and destroyed the best factories. OmniTech became one of the primary suppliers of the Solarian defenders, and when Terra Belmond and dozens of other former Solaris fighters returned, OmniTech's Colossus once again gained the spotlight. In battle after battle, Terra's Colossus anchored the lines and took everything the Word threw at her.
         When the Solaris and DropShip Irregulars and their allies finally drove the Word away, OmniTech had a genuine war hero to sell their product. It took them years to rebuild the factories that time had cost them, but in 3080 they finally ushered in a new era with their first fully-automated production line. On it they built the CLS-6S Colossus.

         The CLS-6S Colossus is the final evolution of the Colossus series of BattleMechs, and has remained in constant production for twenty years now. A Nutcracker assault autocannon and an array of Pinpricker pulse lasers gives it the ability to fire at a range of opponents, whether move fast or slow, or come in close or keep their distance. While it lacks the coolant pods of the older versions, it carries enough heat sinks to fire the Pinprickers with few problems. The autocannon can generate difficulties, but it has become standard practice to only bring it into action when the MechWarrior has a good shot. Even with three tons of ammunition, it can run out quickly if the MechWarrior holds the trigger down.
         Faster than the previous entries in the Colossus series, the 6S uses a modified Shipil extra-light engine. Originally an AeroSpace engine, the Shipil-series engines have since been installed in all OmniTech designs, giving them a unique sound and feel on the Solaris Circuit. Capable of easily moving over 60 kph while firing, the modern Colossus is far faster than most assault 'Mechs in the Human Sphere. While many do carry more weapons, very few can match the impressive Rock Hard armor plating that makes it extremely hard to bring a Colossus down in battle.
         Finally, a series of Lexington Lifters in the legs and torso allow the design to fly through the arenas, or over the battlefield. The mere sight of such a massive BattleMech performing that feat has caused many MechWarriors to punch the auto-eject out of reflex, especially when the Colossus' flight path is aimed at them.

         One of the official command BattleMechs of the Solaris Irregulars, and still piloted by Terra Belmond and others in the DropShip Irregulars, the Colossus is one of the flagship BattleMechs of Solaris. It is also a crowd favorite on the Solaris Circuit. OmniTech markets the design to the Allied Mercenary Command as well, and many units that need a fast and maneuverable assault 'Mech use the Colossus.