The UK's Competition and Markets Authority (CMA) has imposed more restrictions on Microsoft and Activision Blizzard.
In an interim order published on its website, the organisation has stopped either company from "acquiring an interest" in one another. The CMA has said that Microsoft and Activision need to be given written approval to buy a subsidiary of one another, buy an interest in one another or even hold the option to do either of the above.
This comes in the wake of the CMA blocking Microsoft's acquisition of Activision Blizzard due to the organisation's concerns over the Xbox giant's cloud games business.
Both Microsoft and Activision Blizard have vowed to appeal the deal. The former's president, Brad Smith, has said that blocking the acquisition is "bad for Britain" while the latter's chief comms officer Lulu Cheng Meservey has said that the move signifies that "the UK is closed for business".