Talk:BLACK Version/@comment-27751830-20180308145811

There have been some events, especially the times where every player can kill zombies to get to a total to recieve high rewards and other competitive events to get to the top 5% or 1% that does help out to obtain keys faster, but you have to play often to get such rewards. I am not often lucky to obtain such things (though I have quite a good amount of keys from events, not hardcore mode) so I never acquired a black strongbox in my life... But, that's probably why I keep playing the game, just to get better and strive for the best!