SteamPunk Helix! Although it has the same combat attributes of the standard Helix, this AirMech has been heavily customized and re-engineered to be powered by high pressure steam! Salvaged without a power core, engineers did what they could to supply it with this amazing alternate power source.
Prime Helix! The original prototype AirMech, Prime Helix has become an exclusive collector's item. It was created as part of a top secret project by the USAF as the first weaponized transforming vehicle, which was expressly forbidden as part of the technology exchange among the Future Technology Coalition. In reality many countries were secretly working on these weapons of war, but Helix is widely regarded as the most successful prototype of it's kind.
BlackOps Helix. This Helix has been modified for covert operations. Technically no longer useful because of current radar technology, it was once a stealthy assassin for a pre-War government, Now its striking design is for cosmetic purposes only. It's common that owners very attached to their AirMechs will seek out special or one of a kind models to show off.
Heart of the Void! The modified power source of this AirMech gives it a perfect black appearance with a silhouette that shimmers and glows with the pilot's team color. These variants can only be crafted by the Nanoforge.
Relics left over from when countries would see who could make the most powerful AirMechs in a "friendly" competition. Billions of dollars were dedicated to crafting these Ultimate examples of their class, but now a few lucky pilots can put them to good use!