Playing a poker face is the basic way to act unreadable in the game poker even though you have a good card you won't show your emotions instead act as if you will lose. Just playing mind games with your opponents will make them bait your bluff. In the end if you don't want this kind hastle play online so you don't have to worry about your facial expressions.
It is not the Poker face is what you need but to Fold your emotion and never let anyone find it there.
But like one Poster , Yeah it won't be called as Pokerface if it is not adopted in that Game and strategy.
This is difficult to do and from my experience, those people that with extraordinary ability to control their emotions can only do this and often times they treat gambling as their career. If in a normal situation or other type of gambling games we can't control our emotion then being unpredicatable in poker is really impossible. Each of us has a 1 or 2 particular strategy that we follow in gambling, if we stick to that then in the long run our opponent will get used to it. To be unpredictable is to use different types of strategy as well as learning to be emotionless in different situations.
It does not need Extraordinary skill to do this mate, Instead all you need is to Maintain your emotion why Playing .
That will be the Best way for opponent not to Read you.