Well, I think the OP is talking about Poser characters being used in 3D games...  I've seen a few Poser looking figures (2D) in indie and web based games as well.

I'm using Poser to create art for a 2D game at the moment myself.  Not using any characters though, just importing props and rendering in Poser.  My familiarity with Poser and its library structure led me to using it for this game as I have multiple environments with their own light presets but which also share in-game objects.  I wanted to keep my Scene/Props/Lights/Materials organized and Poser is already set up to do that quite nicely.  It's likely at some point I will be creating custom figures and rendering them for use in this project.

I do have a few Poser figures I'd like to run through PoserGD.  I want to try getting them into iClone 6 when that is released and maybe UE4, which I plan on messing around with sometime soon.  If I have any luck getting figures out of Poser I plan to start making custom figures inside of Poser (I've pretty comfortable with the set-up room, just haven't made anything complex yet).  I want to be able to use the same figures in both Poser and iClone and also a game engine (likely UE4 or Unity).  Getting them out of iClone would require 3DXchange Pipeline version, and that's just bit out of my range ATM.