Did the concept for that game even exist a year ago?
What I was able to dig up on google is that the game was released Summer of 2015, but was in the works for 2 years (take that with a grain of salt, wasn't easy to finding someone who said when it was released). It's possible that this character was created for the game, but given the 18+ image of this same character uploaded around the same time by the artist, I'd suspect more that they hired the artist later and this character design was used for their game.
I'm going to go ahead and put the world_of_tanks and original tags back on here as well. Later artwork of this character shouldn't get those tags, but as the 18+ image (post #1780881) really is a WoT's game reference, it's most probable that this was an original/WoT personification as well.