Some basic background about the Erigoneans and their basic physical characteristics:
ABOUT
The Erigoneans are a bipedal, semi-humanoid species originating from the Erigone system, which is located in the Republic of Erigone near the Microsol Consortium. They stand around four meters tall (when completely erect--they usually assume a slightly hunched-over posture) and weigh around 1,400 pounds. They are similar in overall proportions to a human being, except far more muscular and powerful in appearance. They have several small red eyes on their massive heads, which have very little neck between them and the creatures' powerful shoulders.
They are immensely strong despite their weight (which is mostly muscle and bone), and can toss a human around like a ragdoll or break his spine with a single effortless blow. They are also very resilient to injury, and can withstand even the loss of a limb without faltering. Their blood is greenish yellow and does not clot as quickly as human blood, making Erigoneans more susceptible to fatal blood loss in the case of severe injury. Even then, an Erigonean will keep fighting even in severe shock, only falling when he has bled to death. Life expectancy for 41st-century Erigoneans is 785 Earth years, compared to 1,206 for humans.
Erigoneans have a cranial capacity of around 900 cubic centimeters, and are generally somewhat less intelligent than humans (average IQ is around 95, compared to 120 for humans and 130 for Vasudans). Erigoneans' vocal cords aren't as developed as those of other sentient beings, and their speech is clumsy and not very resonant. Vasudans sometimes derisively refer to Erigoneans as "Khass'ythi", or "hissers" because their voices sound a bit like a snake hissing. Erigoneans are capable of speaking their own language and a heavily accented bastardization of Terran Standard, but Vasudan is beyond their capabilities.
GENERAL REQUIREMENTS:
-Around 4m tall when fully upright, somewhat shorter in their normal posture
-Usually have a hunchback posture, with a slow, heavy gait
-Much slower and less agile than humans
-Very strong and tough
-Several beady red eyes
-A powerful head with massive jaws capable of immense bite force
-Usually wear form-fitting armor covering their torso, thighs, and upper arms, and high-tech-looking boots
-May carry threatening-looking but practical weapons
-Gray, somewhat dead-looking skin. No hair.
I chose the Doom III Hell Knight as a basic concept to start off with. You may alter this basic design as you see fit to fulfill the requirements and make it somewhat original (I don't want to make it look like a ripoff):

Submissions may be in the form of TrueSpace .COB models or drawings on paper (preferably the former).