Mass Effect

Mass Effect is the first game in BioWare's famous space opera action-RPG trilogy. Started off as an Xbox 360 exclusive in 2007 before getting an optimized PC version the next year. While the second and third games were released for the PlayStation 3, the first game didn't get on the console until Mass Effect Trilogy in 2012.

Hidden Manufacturers
There are several item manufacturers in the game whose items can only be accessed by using console commands to equip their weapons/armor.

Batarian State Arms
In-game description: "Batarian State Arms is a military-controlled hardware manufacturing company. The batarian government does not trust private industry to create their military hardware. BSA is a vast nationalized institution infamous for its waste and corruption. It produces effective, if unethical, chemical weapons and a line of Nuclear, Chemical, and Biological (NBC) protective armor."

Note: This is the only one of the hidden manufacturers with an item that can (rarely) be seen without console commands; the Terminator rifle can sometimes be found during the Bring Down the Sky DLC in the PC version.

Weapons
Batarian State Arms' weapons don't seem to have any specific theme naming going on, except perhaps just being generally ominous.

Armor
Batarian State Arms' Partisan and Skirmish armors are available in human, turian (light/medium only), and krogan (medium/heavy only) variants. The two sets of armor have the same stats and models, with the heavy armor model being used for all three armor weights.

Cerberus Skunkworks
In-game description: "The operatives of Cerberus produce their own specialist hardware for black ops wetwork. Their weapons are advanced particle beams with excellent shield penetration, damage, and accuracy. Their field hardsuits feature advanced protective measures and sophisticated anti-hacking measures."

Weapons
All of Cerberus Skunkworks' weapons are named after monsters in Greek mythology.

Hahne-Kedar Shadow Works
In-game description: "Founded a decade ago, this Hahne-Kedar subsidiary is a place for younger employees to "think outside the box". HKSW supplies weapons and armor to Alliance special forces units. In keeping with the parent company's philosophy, products are rugged, reliable, and require less maintenance than competitors."

Weapons
All of Hahne-Kedar Shadow Works' weapons are named after types of snakes.

Jormangund Technology
In-game description: "A rising star of post-contact human industry, Jormangund returns consistent profits through aggressive integration of alien technologies. Mainly known for advanced optical computers and AI "blueboxes", the company has recently developed a "micro gravitic" personal weapon that effectively fires small disruptor torpedoes."

Weapons
Jormangund Technology's weapons do not have any theme naming.