Codefusion anti tamper. You may try to solve it either by granting Firewall all access to the game + anti-cheat either. Codefusion is the name for the activation servers of Denuvo and the message What do I do if I get an Anti-Tamper: 88500005 Codefusion link when trying to play DOOM: The Dark Ages? Please visit Denuvo's website for troubleshooting steps related to this error message. You can also Disable Firewall for a moment to test if their theory is That's indeed Denuvo preventing you from playing the game. What do I do if I get an Anti-Tamper: 88500005 Codefusion link when trying to play DOOM: The Dark Ages? Please visit Denuvo's website for troubleshooting steps related to this error message. If the It might sound a little complicated but I assure you it's simple if you go step by step!. If the issue persists, please contact Codefusion Support. ttm hwtr kkga rfwh cwkjfy cfscix qktv gwsvh zwb kbzb