@MrPutuLips - I’ve just recently got MSI Afterburner working really well, and recording 720p vids at fairly high framerates. Blender games might be tougher to set up, but I know that MSI Afterburner works with them (I recorded pretty much all of my game videos with it). I believe MSI won’t record 64-bit applications - only 32-bit.
@digiman - I would suggest MSI Afterburner, which is free. I use it set to MJPG compression in an AVI container. You can adjust the quality and framerate as you wish, but I have mine set to 100%, 60 FPS, and a full frame. The game I just finished recording (Caster) wasn’t able to run completely at 60 FPS all of the time, but at 49 FPS or so minimum, which is still pretty smooth. After recording, I pushed it over to Blender to edit and output. Mess about with it for a little while, and if it doesn’t work out, then you could try Dxtory, which seems to be about $37 for a license. Fraps is $37 and Bandicam is $39. For Fraps and Bandicam, there’s the free versions, but I believe they have some restrictions to deal with (a watermark, for example).