The gaming companies all signed an amicus brief that supports the ruling without legal bindings. Electronic Arts had this to say on their webpage:
Electronic Arts has joined with dozens of leading US employers in signing an amicus brief that opposes the Defense of Marriage Act (DOMA) and urges the Ninth Circuit Court of Appeals to find portions of the Act unconstitutional.
DOMA presents a number of problems for businesses like EA, as it creates regulatory, tax, and discrimination complications for employers, and that’s why we’re standing against it. The underlying lawsuit impacts all employers no matter how big or small, and no matter the industry, and we encourage other business to join these efforts.
Major companies like Google, eBay, Viacom, and CBS have also joined the fight to in going against DOMA.
The 9th Circuit is already hearing an appeal on a recent legal debate known as Golinski vs. the U.S. Office of Personal Management where it also finds unconstitutional parts in the act. The original case of Golinski started with the settlement gained by Karen Golinski who was able to give her employee’s wife federal health benefits, however it was then appealed by BLAG, the Bi-Partisan Legal Advisory Group.