This is the Big Fish action figure of Garrus from Mass Effect 2 - recalibrated a bit.
You can get a decent idea of how big the figure is from my fingers in some of the photos. I haven't done a lot of detailed painting at that small of a scale before and wasn't sure how well I'd do, but I enjoyed working on this quite a lot. At the moment, I've just done his face - not sure if I want to do anything with his armor yet or not. I also had to remove his visor to do the repaint. I'll be reattaching it once I've done a bit of work on it.
I will say that the original figure's cast is actually very good. I didn't do any adjustments aside from repainting. All of the lovely detail was there - it just needed a bit of work to bring it out! The only thing I wish I could fix that I probably won't be able to are the little spurs under his mandibles; there are supposed to be two, and much narrower than that, but they're just too small to adjust easily!
Just to be clear, I did not sculpt him - I just repainted the existing action figure. Garrus and Mass Effect belong to BioWare.