The manufacturer was Rackham, the game was Confrontation. The figures themselves are Orc Brutes.
There's no saying how awesome that company and their products would be today, hadn't they made the dumbest decision ever in 2006.
At that point everybody loved their metal miniatures, detailed and full of character as they were (
http://rackhamminiatures.yolasite.com/; have fun!), and then they went and wanted to compete with GW's games instead of just minis.
They completely focussed on the game itself (before that it was a good game, with the second biggest market share) and went from these metal minis to prepainted plastics.
It goes without saying they went belly up in no time.
I am an afficionado of the line and you will see many more painted up for HeroQuest to come.
At some point, a few size comparison pictures are in order. These Orcs are pretty freakin' bulky and they will replace the Fimir in the original quests, themselves to be replaced by Beastmen. I'll rewrite the quests anyway, so I can accomodate for these changes just as well.
Thanks for the kind words, guys.
Anderas, in case you're interested in the how: I merely basecoated silver over black (you might want to choose a darker metallic, maybe mix in a touch of black or dark blue/green(brown), then washed and glazed with brown and black inks, then did some rust (too little, I'm afraid) and the scratches. I will probably go back to these at some point and improve the metals.