How i can make or win bitcoins by selling or doing specifics things in a Video game? i want to know what games and the metods to do this possible 
Then you must do search about what games pay off bitcoin but I think the best way to earn with it is by playing your desire MMORPG online games and acquire items that you can sell to other people that willing to make a transaction using bitcoin.
There is a multiple ICO's that will gonna do this in their platform so participating in altcoins that caters game items trading is much better for me, just convert it to bitcoin afterwards.
I saw this icos, unfortunately one game I tried can't be played in my country, that was bad luck. I like to play games and earn from that, but at the moment there isn't much games about it. I think with playing CS you can win some chests, items and then sell them for bitcoins, I played cs a bit but I didn't won nothing valuable for selling.
Except this games android have big choice of simple games, but they are fun just in the beginning after some time it becomes boring to play one same thing over and over again.