What is the best free screen recording program for windows 8.1?

I would like to start recording me making sims houses playing the sims and minecraft. But i would like to know what is the best FREE recording program to use for windows 8.1?
I want to be abler to record me talking as well.
No hate comments about windows 8.
i don't want lag either.

Try
bandicam
fraps
dxtory
action
camtasia
they all have free trials i think can't think of any free ones

There's no good free ones, Fraps is really good but costs money, it can record voice, has no lag, works on windows 8, ETC.