Abysmally bad game. Played at launch, and it was a broken mess, TRS panicked because they were getting (well deserved) negative reviews, followed by Tencent buying them (sketchy). Came back to see if it improved since release, long story short, it has definitively not. People compare this game to L4D because TRS literally branded this game as a "spiritual successor" to it. They even BRAZENLY claimed "from the makers of l4D" on the game, even though out of the 250+ people that worked on L4D, SIX of them were on B4B development. So yes, all criticisms and comparisons to L4D are absolutely justified.
1/10 never make a game again (TRS/tencent)