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 
I know that this thread is really old, but recently there are already games that are possible to earn BTC while playing. Lightnite is one example, which was inspired by Fortnite. You can bet your BTC in the pool and you can win more by just keep winning games.
On the other hand, there are rumors about a classic MMORPG named RF Online that would transition into play-to-earn in which players can be airdropped with BTC and ETH, but I am not sure how it works though.