In this picture you can see all the models in the game
Well, Acheson Miniatures has some Hishen and Grath but they are so ugly that I would not even want them for free! Here you can see an illustration of a Grath from the 5150 ruleset and my find from Gow.
And here you can see the Acheson's Grath (Eeeeew!).
Anyway, I will play the game Gears of War one of these days and maybe I would like it! :)
This would be a Hishen team or squad. 1 Razor (top left), 1 Grath (top right), 3 Hishen warriors, the one in the middle specialist with a stun cannon to get prisoners alive, 2 uncompleted Hishen warriors used as trackers or shepherds, and 2 "hounds" to chase fugitives. The game gives you enough figures to build three squads.
These are the four marines it comes in the box.
A shot next to one GW's Space Marine and one Copplestone's marine. As you can see, although the GoW marine is thinner and taller, it matches perfectly with them. The miniatures are made of semi rigid plastic like the ones from Doom or Descent.
A Grath next to a human.
I do not know yet what this huge monster would be. (the brutal brigade?)