 Tripwire Interactive has announced that its now decade-old game series Killing Floor has brought in over $100 million in revenue since its 2009 start. ...
The Killing Floor series has earned $100 million in revenue in 10 years
Game Developer - 15 May 2019 19:51
 Tripwire Interactive has announced that its now decade-old game series Killing Floor has brought in over $100 million in revenue since its 2009 start. ...
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